ICS Advisory

Siemens OpenSSL Vulnerability in Industrial Products

Release Date
Alert Code
ICSA-25-259-05
Related topics:
Industrial Control System Vulnerabilities, Industrial Control Systems

As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global).

View CSAF

1. EXECUTIVE SUMMARY

  • CVSS v3 7.4
  • ATTENTION: Exploitable remotely
  • Vendor: Siemens
  • Equipment: INDUSTRIAL EDGE, RUGGEDCOM, SCALANCE, SIMATIC, SINEC, SINEMA, SINUMERIK, SIPLUS, TIA
  • Vulnerability: Out-of-bounds Read

2. RISK EVALUATION

Successful exploitation of these vulnerabilities could allow an unauthenticated remote attacker to execute arbitrary code or to cause a denial-of-service condition.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

Siemens reports that the following products are affected:

  • Siemens Industrial Edge - Machine Insight App: All versions
  • Siemens RUGGEDCOM ROX RX1510: All versions prior to V2.15.0
  • Siemens SCALANCE X201-3P IRT PRO (6GK5201-3JR00-2BA6): All versions prior to V5.5.2
  • Siemens SCALANCE X202-2IRT (6GK5202-2BB00-2BA3): All versions prior to V5.5.2
  • Siemens SCALANCE X202-2P IRT (6GK5202-2BH00-2BA3): All versions prior to V5.5.2
  • Siemens SCALANCE X202-2P IRT PRO (6GK5202-2JR00-2BA6): All versions prior to V5.5.2
  • Siemens SCALANCE X204-2 (6GK5204-2BB10-2AA3): All versions prior to V5.2.6
  • Siemens SCALANCE X204-2FM (6GK5204-2BB11-2AA3): All versions prior to V5.2.6
  • Siemens SCALANCE X204-2LD (6GK5204-2BC10-2AA3): All versions prior to V5.2.6
  • Siemens SCALANCE X204-2LD TS (6GK5204-2BC10-2CA2): All versions prior to V5.2.6
  • Siemens SCALANCE X204-2TS (6GK5204-2BB10-2CA2): All versions prior to V5.2.6
  • Siemens SCALANCE X204IRT (6GK5204-0BA00-2BA3): All versions prior to V5.5.2
  • Siemens RUGGEDCOM ROX RX1511: All versions prior to V2.15.0
  • Siemens SCALANCE X204IRT PRO (6GK5204-0JA00-2BA6): All versions prior to V5.5.2
  • Siemens SCALANCE X206-1 (6GK5206-1BB10-2AA3): All versions prior to V5.2.6
  • Siemens SCALANCE X206-1LD (6GK5206-1BC10-2AA3): All versions prior to V5.2.6
  • Siemens SCALANCE X208 (6GK5208-0BA10-2AA3): All versions prior to V5.2.6
  • Siemens SCALANCE X208PRO (6GK5208-0HA10-2AA6): All versions prior to V5.2.6
  • Siemens SCALANCE X212-2 (6GK5212-2BB00-2AA3): All versions prior to V5.2.6
  • Siemens SCALANCE X212-2LD (6GK5212-2BC00-2AA3): All versions prior to V5.2.6
  • Siemens SCALANCE X216 (6GK5216-0BA00-2AA3): All versions prior to V5.2.6
  • Siemens SCALANCE X224 (6GK5224-0BA00-2AA3): All versions prior to V5.2.6
  • Siemens SCALANCE X302-7 EEC (230V, coated) (6GK5302-7GD00-3GA3): All versions prior to V4.1.4
  • Siemens RUGGEDCOM ROX RX1512: All versions prior to V2.15.0
  • Siemens SCALANCE X302-7 EEC (230V) (6GK5302-7GD00-3EA3): All versions prior to V4.1.4
  • Siemens SCALANCE X302-7 EEC (24V, coated) (6GK5302-7GD00-1GA3): All versions prior to V4.1.4
  • Siemens SCALANCE X302-7 EEC (24V) (6GK5302-7GD00-1EA3): All versions prior to V4.1.4
  • Siemens SCALANCE X302-7 EEC (2x 230V, coated) (6GK5302-7GD00-4GA3): All versions prior to V4.1.4
  • Siemens SCALANCE X302-7 EEC (2x 230V) (6GK5302-7GD00-4EA3): All versions prior to V4.1.4
  • Siemens SCALANCE X302-7 EEC (2x 24V, coated) (6GK5302-7GD00-2GA3): All versions prior to V4.1.4
  • Siemens SCALANCE X302-7 EEC (2x 24V) (6GK5302-7GD00-2EA3): All versions prior to V4.1.4
  • Siemens SCALANCE X304-2FE (6GK5304-2BD00-2AA3): All versions prior to V4.1.4
  • Siemens SCALANCE X306-1LD FE (6GK5306-1BF00-2AA3): All versions prior to V4.1.4
  • Siemens SCALANCE X307-2 EEC (230V, coated) (6GK5307-2FD00-3GA3): All versions prior to V4.1.4
  • Siemens RUGGEDCOM ROX RX1524: All versions prior to V2.15.0
  • Siemens SCALANCE X307-2 EEC (230V) (6GK5307-2FD00-3EA3): All versions prior to V4.1.4
  • Siemens SCALANCE X307-2 EEC (24V, coated) (6GK5307-2FD00-1GA3): All versions prior to V4.1.4
  • Siemens SCALANCE X307-2 EEC (24V) (6GK5307-2FD00-1EA3): All versions prior to V4.1.4
  • Siemens SCALANCE X307-2 EEC (2x 230V, coated) (6GK5307-2FD00-4GA3): All versions prior to V4.1.4
  • Siemens SCALANCE X307-2 EEC (2x 230V) (6GK5307-2FD00-4EA3): All versions prior to V4.1.4
  • Siemens SCALANCE X307-2 EEC (2x 24V, coated) (6GK5307-2FD00-2GA3): All versions prior to V4.1.4
  • Siemens SCALANCE X307-2 EEC (2x 24V) (6GK5307-2FD00-2EA3): All versions prior to V4.1.4
  • Siemens SCALANCE X307-3 (6GK5307-3BL00-2AA3): All versions prior to V4.1.4
  • Siemens SCALANCE X307-3 (6GK5307-3BL10-2AA3): All versions prior to V4.1.4
  • Siemens SCALANCE X307-3LD (6GK5307-3BM10-2AA3): All versions prior to V4.1.4
  • Siemens RUGGEDCOM ROX RX1536: All versions prior to V2.15.0
  • Siemens SCALANCE X307-3LD (6GK5307-3BM00-2AA3): All versions prior to V4.1.4
  • Siemens SCALANCE X308-2 (6GK5308-2FL00-2AA3): All versions prior to V4.1.4
  • Siemens SCALANCE X308-2 (6GK5308-2FL10-2AA3): All versions prior to V4.1.4
  • Siemens SCALANCE X308-2LD (6GK5308-2FM00-2AA3): All versions prior to V4.1.4
  • Siemens SCALANCE X308-2LD (6GK5308-2FM10-2AA3): All versions prior to V4.1.4
  • Siemens SCALANCE X308-2LH (6GK5308-2FN00-2AA3): All versions prior to V4.1.4
  • Siemens SCALANCE X308-2LH (6GK5308-2FN10-2AA3): All versions prior to V4.1.4
  • Siemens SCALANCE X308-2LH+ (6GK5308-2FP00-2AA3): All versions prior to V4.1.4
  • Siemens SCALANCE X308-2LH+ (6GK5308-2FP10-2AA3): All versions prior to V4.1.4
  • Siemens SCALANCE X308-2M (6GK5308-2GG00-2AA2): All versions prior to V4.1.4
  • Siemens RUGGEDCOM ROX RX5000: All versions prior to V2.15.0
  • Siemens SCALANCE X308-2M (6GK5308-2GG10-2AA2): All versions prior to V4.1.4
  • Siemens SCALANCE X308-2M PoE (6GK5308-2QG00-2AA2): All versions prior to V4.1.4
  • Siemens SCALANCE X308-2M PoE (6GK5308-2QG10-2AA2): All versions prior to V4.1.4
  • Siemens SCALANCE X308-2M TS (6GK5308-2GG00-2CA2): All versions prior to V4.1.4
  • Siemens SCALANCE X308-2M TS (6GK5308-2GG10-2CA2): All versions prior to V4.1.4
  • Siemens SCALANCE X310 (6GK5310-0FA00-2AA3): All versions prior to V4.1.4
  • Siemens SCALANCE X310 (6GK5310-0FA10-2AA3): All versions prior to V4.1.4
  • Siemens SCALANCE X310FE (6GK5310-0BA00-2AA3): All versions prior to V4.1.4
  • Siemens SCALANCE X310FE (6GK5310-0BA10-2AA3): All versions prior to V4.1.4
  • Siemens SCALANCE X320-1 FE (6GK5320-1BD00-2AA3): All versions prior to V4.1.4
  • Siemens SCALANCE M804PB (6GK5804-0AP00-2AA2): All versions prior to V7.1
  • Siemens SCALANCE X320-1-2LD FE (6GK5320-3BF00-2AA3): All versions prior to V4.1.4
  • Siemens SCALANCE X408-2 (6GK5408-2FD00-2AA2): All versions prior to V4.1.4
  • Siemens SCALANCE XF201-3P IRT (6GK5201-3BH00-2BD2): All versions prior to V5.5.2
  • Siemens SCALANCE XF202-2P IRT (6GK5202-2BH00-2BD2): All versions prior to V5.5.2
  • Siemens SCALANCE XF204 (6GK5204-0BA00-2AF2): All versions prior to V5.2.6
  • Siemens SCALANCE XF204-2 (6GK5204-2BC00-2AF2): All versions prior to V5.2.6
  • Siemens SCALANCE XF204-2BA IRT (6GK5204-2AA00-2BD2): All versions prior to V5.5.2
  • Siemens SCALANCE XF204IRT (6GK5204-0BA00-2BF2): All versions prior to V5.5.2
  • Siemens SCALANCE XF206-1 (6GK5206-1BC00-2AF2): All versions prior to V5.2.6
  • Siemens SCALANCE XF208 (6GK5208-0BA00-2AF2): All versions prior to V5.2.6
  • Siemens SCALANCE M812-1 ADSL-Router (Annex A) (6GK5812-1AA00-2AA2): All versions prior to V7.1
  • Siemens SCALANCE XR324-12M (230V, ports on front) (6GK5324-0GG00-3AR2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-12M (230V, ports on front) (6GK5324-0GG10-3AR2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-12M (230V, ports on rear) (6GK5324-0GG00-3HR2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-12M (230V, ports on rear) (6GK5324-0GG10-3HR2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-12M (24V, ports on front) (6GK5324-0GG00-1AR2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-12M (24V, ports on front) (6GK5324-0GG10-1AR2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-12M (24V, ports on rear) (6GK5324-0GG00-1HR2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-12M (24V, ports on rear) (6GK5324-0GG10-1HR2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-12M TS (24V) (6GK5324-0GG00-1CR2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-12M TS (24V) (6GK5324-0GG10-1CR2): All versions prior to V4.1.4
  • Siemens SCALANCE M812-1 ADSL-Router (Annex B) (6GK5812-1BA00-2AA2): All versions prior to V7.1
  • Siemens SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on front) (6GK5324-4GG00-3ER2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on front) (6GK5324-4GG10-3ER2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on rear) (6GK5324-4GG00-3JR2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on rear) (6GK5324-4GG10-3JR2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-4M EEC (24V, ports on front) (6GK5324-4GG00-1ER2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-4M EEC (24V, ports on front) (6GK5324-4GG10-1ER2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-4M EEC (24V, ports on rear) (6GK5324-4GG00-1JR2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-4M EEC (24V, ports on rear) (6GK5324-4GG10-1JR2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on front) (6GK5324-4GG00-4ER2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on front) (6GK5324-4GG10-4ER2): All versions prior to V4.1.4
  • Siemens SCALANCE M816-1 ADSL-Router (Annex A) (6GK5816-1AA00-2AA2): All versions prior to V7.1
  • Siemens SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on rear) (6GK5324-4GG00-4JR2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on rear) (6GK5324-4GG10-4JR2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-4M EEC (2x 24V, ports on front) (6GK5324-4GG00-2ER2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-4M EEC (2x 24V, ports on front) (6GK5324-4GG10-2ER2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-4M EEC (2x 24V, ports on rear) (6GK5324-4GG00-2JR2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-4M EEC (2x 24V, ports on rear) (6GK5324-4GG10-2JR2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-4M PoE (230V, ports on front) (6GK5324-4QG00-3AR2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-4M PoE (230V, ports on rear) (6GK5324-4QG00-3HR2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-4M PoE (24V, ports on front) (6GK5324-4QG00-1AR2): All versions prior to V4.1.4
  • Siemens SCALANCE XR324-4M PoE (24V, ports on rear) (6GK5324-4QG00-1HR2): All versions prior to V4.1.4
  • Siemens Industrial Edge - PROFINET IO Connector: All versions prior to V1.1.1
  • Siemens SCALANCE M816-1 ADSL-Router (Annex B) (6GK5816-1BA00-2AA2): All versions prior to V7.1
  • Siemens SCALANCE XR324-4M PoE TS (24V, ports on front) (6GK5324-4QG00-1CR2): All versions prior to V4.1.4
  • Siemens SIMATIC CP 1242-7 V2 (6GK7242-7KX31-0XE0): All versions prior to V3.3.46
  • Siemens SIMATIC CP 1243-1 (6GK7243-1BX30-0XE0): All versions prior to V3.3.46
  • Siemens SIMATIC CP 1243-7 LTE EU (6GK7243-7KX30-0XE0): All versions prior to V3.3.46
  • Siemens SIMATIC CP 1243-7 LTE US (6GK7243-7SX30-0XE0): All versions prior to V3.3.46
  • Siemens SIMATIC CP 1243-8 IRC (6GK7243-8RX30-0XE0): All versions prior to V3.3.46
  • Siemens SIMATIC CP 1542SP-1 (6GK7542-6UX00-0XE0): All versions prior to V2.2.28
  • Siemens SIMATIC CP 1543-1 (6GK7543-1AX00-0XE0): All versions prior to V3.0.22
  • Siemens SIMATIC CP 1543SP-1 (6GK7543-6WX00-0XE0): All versions prior to V2.2.28
  • Siemens SIMATIC CP 1545-1 (6GK7545-1GX00-0XE0): All versions prior to V1.1
  • Siemens SCALANCE M826-2 SHDSL-Router (6GK5826-2AB00-2AB2): All versions prior to V7.1
  • Siemens SIMATIC PCS neo (Administration Console): All versions < V3.1 SP 1
  • Siemens SIMATIC Process Historian OPC UA Server: All versions prior to V2020 SP1
  • Siemens SIMATIC S7-1200 CPU family (incl. SIPLUS variants): All versions prior to V4.5.2
  • Siemens SINEC NMS: All versions prior to V1.0.3
  • Siemens SINEMA Remote Connect Server: All versions prior to V3.1
  • Siemens SINEMA Server V14: All versions
  • Siemens SINUMERIK Operate: All versions prior to V4.95 SP1
  • Siemens SIPLUS ET 200SP CP 1543SP-1 ISEC (6AG1543-6WX00-7XE0): All versions prior to V2.2.28
  • Siemens SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL (6AG2543-6WX00-4XE0): All versions prior to V2.2.28
  • Siemens SIPLUS NET CP 1242-7 V2 (6AG1242-7KX31-7XE0): All versions prior to V3.3.46
  • Siemens SCALANCE M874-2 (6GK5874-2AA00-2AA2): All versions prior to V7.1
  • Siemens SIPLUS NET CP 1543-1 (6AG1543-1AX00-2XE0): All versions prior to V3.0.22
  • Siemens SIPLUS NET SCALANCE X308-2 (6AG1308-2FL10-4AA3): All versions prior to V4.1.4
  • Siemens SIPLUS S7-1200 CP 1243-1 (6AG1243-1BX30-2AX0): All versions prior to V3.3.46
  • Siemens SIPLUS S7-1200 CP 1243-1 RAIL (6AG2243-1BX30-1XE0): All versions prior to V3.3.46
  • Siemens TIA Administrator: All versions < V1.0 SP7
  • Siemens SCALANCE M874-3 (6GK5874-3AA00-2AA2): All versions prior to V7.1
  • Siemens SCALANCE M876-3 (EVDO) (6GK5876-3AA02-2BA2): All versions prior to V7.1
  • Siemens SCALANCE M876-3 (ROK) (6GK5876-3AA02-2EA2): All versions prior to V7.1
  • Siemens SCALANCE M876-4 (EU) (6GK5876-4AA00-2BA2): All versions prior to V7.1
  • Siemens SCALANCE M876-4 (NAM) (6GK5876-4AA00-2DA2): All versions prior to V7.1
  • Siemens SCALANCE MUM853-1 (EU) (6GK5853-2EA00-2DA1): All versions prior to V7.1
  • Siemens SCALANCE MUM856-1 (EU) (6GK5856-2EA00-3DA1): All versions prior to V7.1
  • Siemens RUGGEDCOM RM1224 LTE(4G) EU (6GK6108-4AM00-2BA2): All versions prior to V7.1
  • Siemens SCALANCE MUM856-1 (RoW) (6GK5856-2EA00-3AA1): All versions prior to V7.1
  • Siemens SCALANCE S615 (6GK5615-0AA00-2AA2): All versions prior to V7.1
  • Siemens SCALANCE SC622-2C (6GK5622-2GS00-2AC2): All versions prior to V2.3
  • Siemens SCALANCE SC632-2C (6GK5632-2GS00-2AC2): All versions prior to V2.3
  • Siemens SCALANCE SC636-2C (6GK5636-2GS00-2AC2): All versions prior to V2.3
  • Siemens SCALANCE SC642-2C (6GK5642-2GS00-2AC2): All versions prior to V2.3
  • Siemens SCALANCE SC646-2C (6GK5646-2GS00-2AC2): All versions prior to V2.3
  • Siemens SCALANCE W1748-1 M12 (6GK5748-1GY01-0TA0): All versions prior to V3.0.0
  • Siemens SCALANCE W1748-1 M12 (6GK5748-1GY01-0AA0): All versions prior to V3.0.0
  • Siemens SCALANCE W1788-1 M12 (6GK5788-1GY01-0AA0): All versions prior to V3.0.0
  • Siemens RUGGEDCOM RM1224 LTE(4G) NAM (6GK6108-4AM00-2DA2): All versions prior to V7.1
  • Siemens SCALANCE W1788-2 EEC M12 (6GK5788-2GY01-0TA0): All versions prior to V3.0.0
  • Siemens SCALANCE W1788-2 M12 (6GK5788-2GY01-0AA0): All versions prior to V3.0.0
  • Siemens SCALANCE W1788-2IA M12 (6GK5788-2HY01-0AA0): All versions prior to V3.0.0
  • Siemens SCALANCE W721-1 RJ45 (6GK5721-1FC00-0AA0): All versions
  • Siemens SCALANCE W721-1 RJ45 (6GK5721-1FC00-0AB0): All versions
  • Siemens SCALANCE W722-1 RJ45 (6GK5722-1FC00-0AA0): All versions
  • Siemens SCALANCE W722-1 RJ45 (6GK5722-1FC00-0AB0): All versions
  • Siemens SCALANCE W722-1 RJ45 (6GK5722-1FC00-0AC0): All versions
  • Siemens SCALANCE W734-1 RJ45 (6GK5734-1FX00-0AA0): All versions
  • Siemens SCALANCE W734-1 RJ45 (6GK5734-1FX00-0AB0): All versions
  • Siemens RUGGEDCOM ROX MX5000: All versions prior to V2.15.0
  • Siemens SCALANCE W734-1 RJ45 (6GK5734-1FX00-0AA6): All versions
  • Siemens SCALANCE W734-1 RJ45 (USA) (6GK5734-1FX00-0AB6): All versions
  • Siemens SCALANCE W738-1 M12 (6GK5738-1GY00-0AA0): All versions
  • Siemens SCALANCE W738-1 M12 (6GK5738-1GY00-0AB0): All versions
  • Siemens SCALANCE W748-1 M12 (6GK5748-1GD00-0AA0): All versions
  • Siemens SCALANCE W748-1 M12 (6GK5748-1GD00-0AB0): All versions
  • Siemens SCALANCE W748-1 RJ45 (6GK5748-1FC00-0AA0): All versions
  • Siemens SCALANCE W748-1 RJ45 (6GK5748-1FC00-0AB0): All versions
  • Siemens SCALANCE W761-1 RJ45 (6GK5761-1FC00-0AA0): All versions
  • Siemens SCALANCE W761-1 RJ45 (6GK5761-1FC00-0AB0): All versions
  • Siemens RUGGEDCOM ROX MX5000RE: All versions prior to V2.15.0
  • Siemens SCALANCE W774-1 M12 EEC (6GK5774-1FY00-0TA0): All versions
  • Siemens SCALANCE W774-1 M12 EEC (6GK5774-1FY00-0TB0): All versions
  • Siemens SCALANCE W774-1 RJ45 (6GK5774-1FX00-0AA0): All versions
  • Siemens SCALANCE W774-1 RJ45 (6GK5774-1FX00-0AB0): All versions
  • Siemens SCALANCE W774-1 RJ45 (6GK5774-1FX00-0AC0): All versions
  • Siemens SCALANCE W774-1 RJ45 (6GK5774-1FX00-0AA6): All versions
  • Siemens SCALANCE W774-1 RJ45 (USA) (6GK5774-1FX00-0AB6): All versions
  • Siemens SCALANCE W778-1 M12 (6GK5778-1GY00-0AA0): All versions
  • Siemens SCALANCE W778-1 M12 (6GK5778-1GY00-0AB0): All versions
  • Siemens SCALANCE W778-1 M12 EEC (6GK5778-1GY00-0TA0): All versions
  • Siemens RUGGEDCOM ROX RX1400: All versions prior to V2.15.0
  • Siemens SCALANCE W778-1 M12 EEC (USA) (6GK5778-1GY00-0TB0): All versions
  • Siemens SCALANCE W786-1 RJ45 (6GK5786-1FC00-0AA0): All versions
  • Siemens SCALANCE W786-1 RJ45 (6GK5786-1FC00-0AB0): All versions
  • Siemens SCALANCE W786-2 RJ45 (6GK5786-2FC00-0AA0): All versions
  • Siemens SCALANCE W786-2 RJ45 (6GK5786-2FC00-0AB0): All versions
  • Siemens SCALANCE W786-2 RJ45 (6GK5786-2FC00-0AC0): All versions
  • Siemens SCALANCE W786-2 SFP (6GK5786-2FE00-0AA0): All versions
  • Siemens SCALANCE W786-2 SFP (6GK5786-2FE00-0AB0): All versions
  • Siemens SCALANCE W786-2IA RJ45 (6GK5786-2HC00-0AA0): All versions
  • Siemens SCALANCE W786-2IA RJ45 (6GK5786-2HC00-0AB0): All versions
  • Siemens RUGGEDCOM ROX RX1500: All versions prior to V2.15.0
  • Siemens SCALANCE W788-1 M12 (6GK5788-1GD00-0AA0): All versions
  • Siemens SCALANCE W788-1 M12 (6GK5788-1GD00-0AB0): All versions
  • Siemens SCALANCE W788-1 RJ45 (6GK5788-1FC00-0AA0): All versions
  • Siemens SCALANCE W788-1 RJ45 (6GK5788-1FC00-0AB0): All versions
  • Siemens SCALANCE W788-2 M12 (6GK5788-2GD00-0AA0): All versions
  • Siemens SCALANCE W788-2 M12 (6GK5788-2GD00-0AB0): All versions
  • Siemens SCALANCE W788-2 M12 EEC (6GK5788-2GD00-0TA0): All versions
  • Siemens SCALANCE W788-2 M12 EEC (6GK5788-2GD00-0TB0): All versions
  • Siemens SCALANCE W788-2 M12 EEC (6GK5788-2GD00-0TC0): All versions
  • Siemens SCALANCE W788-2 RJ45 (6GK5788-2FC00-0AA0): All versions
  • Siemens RUGGEDCOM ROX RX1501: All versions prior to V2.15.0
  • Siemens SCALANCE W788-2 RJ45 (6GK5788-2FC00-0AB0): All versions
  • Siemens SCALANCE W788-2 RJ45 (6GK5788-2FC00-0AC0): All versions
  • Siemens SCALANCE WAM766-1 (EU) (6GK5766-1GE00-7DA0): All versions prior to V1.2
  • Siemens SCALANCE WAM766-1 (US) (6GK5766-1GE00-7DB0): All versions prior to V1.2
  • Siemens SCALANCE WAM766-1 EEC (EU) (6GK5766-1GE00-7TA0): All versions prior to V1.2
  • Siemens SCALANCE WAM766-1 EEC (US) (6GK5766-1GE00-7TB0): All versions prior to V1.2
  • Siemens SCALANCE WUM766-1 (EU) (6GK5766-1GE00-3DA0): All versions prior to V1.2
  • Siemens SCALANCE WUM766-1 (US) (6GK5766-1GE00-3DB0): All versions prior to V1.2
  • Siemens SCALANCE X200-4P IRT (6GK5200-4AH00-2BA3): All versions prior to V5.5.2
  • Siemens SCALANCE X201-3P IRT (6GK5201-3BH00-2BA3): All versions prior to V5.5.2

3.2 VULNERABILITY OVERVIEW

3.2.1 OUT-OF-BOUNDS READ CWE-125

ASN.1 strings are represented internally within OpenSSL as an ASN1_STRING structure which contains a buffer holding the string data and a field holding the buffer length. This contrasts with normal C strings which are represented as a buffer for the string data which is terminated with a NUL (0) byte. Although not a strict requirement, ASN.1 strings that are parsed using OpenSSL's own "d2i" functions (and other similar parsing functions) as well as any string whose value has been set with the ASN1_STRING_set() function will additionally NUL terminate the byte array in the ASN1_STRING structure. However, it is possible for applications to directly construct valid ASN1_STRING structures which do not NUL terminate the byte array by directly setting the "data" and "length" fields in the ASN1_STRING array. This can also happen by using the ASN1_STRING_set0() function. Numerous OpenSSL functions that print ASN.1 data have been found to assume that the ASN1_STRING byte array will be NUL terminated, even though this is not guaranteed for strings that have been directly constructed. Where an application requests an ASN.1 structure to be printed, and where that ASN.1 structure contains ASN1_STRINGs that have been directly constructed by the application without NUL terminating the "data" field, then a read buffer overrun can occur. The same thing can also occur during name constraints processing of certificates (for example if a certificate has been directly constructed by the application instead of loading it via the OpenSSL parsing functions, and the certificate contains non NUL terminated ASN1_STRING structures). It can also occur in the X509_get1_email(), X509_REQ_get1_email() and X509_get1_ocsp() functions. If a malicious actor can cause an application to directly construct an ASN1_STRING and then process it through one of the affected OpenSSL functions then this issue could be hit. This might result in a crash (causing a Denial of Service attack). It could also result in the disclosure of private memory contents (such as private keys, or sensitive plaintext). Fixed in OpenSSL 1.1.1l (Affected 1.1.1-1.1.1k). Fixed in OpenSSL 1.0.2za (Affected 1.0.2-1.0.2y).

CVE-2021-3712 has been assigned to this vulnerability. A CVSS v3.1 base score of 7.4 has been calculated; the CVSS vector string is (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H).

3.3 BACKGROUND

  • CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
  • COUNTRIES/AREAS DEPLOYED: Worldwide
  • COMPANY HEADQUARTERS LOCATION: Germany

3.4 RESEARCHER

Siemens reported this vulnerability to CISA.

4. MITIGATIONS

Siemens has identified the following specific workarounds and mitigations users can apply to reduce risk:

  • Industrial Edge - Machine Insight App, SCALANCE W721-1 RJ45 (6GK5721-1FC00-0AA0), SCALANCE W721-1 RJ45 (6GK5721-1FC00-0AB0), SCALANCE W722-1 RJ45 (6GK5722-1FC00-0AA0), SCALANCE W722-1 RJ45 (6GK5722-1FC00-0AB0), SCALANCE W722-1 RJ45 (6GK5722-1FC00-0AC0), SCALANCE W734-1 RJ45 (6GK5734-1FX00-0AA0), SCALANCE W734-1 RJ45 (6GK5734-1FX00-0AA6), SCALANCE W734-1 RJ45 (6GK5734-1FX00-0AB0), SCALANCE W734-1 RJ45 (USA) (6GK5734-1FX00-0AB6), SCALANCE W738-1 M12 (6GK5738-1GY00-0AA0), SCALANCE W738-1 M12 (6GK5738-1GY00-0AB0), SCALANCE W748-1 M12 (6GK5748-1GD00-0AA0), SCALANCE W748-1 M12 (6GK5748-1GD00-0AB0), SCALANCE W748-1 RJ45 (6GK5748-1FC00-0AA0), SCALANCE W748-1 RJ45 (6GK5748-1FC00-0AB0), SCALANCE W761-1 RJ45 (6GK5761-1FC00-0AA0), SCALANCE W761-1 RJ45 (6GK5761-1FC00-0AB0), SCALANCE W774-1 M12 EEC (6GK5774-1FY00-0TA0), SCALANCE W774-1 M12 EEC (6GK5774-1FY00-0TB0), SCALANCE W774-1 RJ45 (6GK5774-1FX00-0AA0), SCALANCE W774-1 RJ45 (6GK5774-1FX00-0AA6), SCALANCE W774-1 RJ45 (6GK5774-1FX00-0AB0), SCALANCE W774-1 RJ45 (6GK5774-1FX00-0AC0), SCALANCE W774-1 RJ45 (USA) (6GK5774-1FX00-0AB6), SCALANCE W778-1 M12 (6GK5778-1GY00-0AA0), SCALANCE W778-1 M12 (6GK5778-1GY00-0AB0), SCALANCE W778-1 M12 EEC (6GK5778-1GY00-0TA0), SCALANCE W778-1 M12 EEC (USA) (6GK5778-1GY00-0TB0), SCALANCE W786-1 RJ45 (6GK5786-1FC00-0AA0), SCALANCE W786-1 RJ45 (6GK5786-1FC00-0AB0), SCALANCE W786-2 RJ45 (6GK5786-2FC00-0AA0), SCALANCE W786-2 RJ45 (6GK5786-2FC00-0AB0), SCALANCE W786-2 RJ45 (6GK5786-2FC00-0AC0), SCALANCE W786-2 SFP (6GK5786-2FE00-0AA0), SCALANCE W786-2 SFP (6GK5786-2FE00-0AB0), SCALANCE W786-2IA RJ45 (6GK5786-2HC00-0AA0), SCALANCE W786-2IA RJ45 (6GK5786-2HC00-0AB0), SCALANCE W788-1 M12 (6GK5788-1GD00-0AA0), SCALANCE W788-1 M12 (6GK5788-1GD00-0AB0), SCALANCE W788-1 RJ45 (6GK5788-1FC00-0AA0), SCALANCE W788-1 RJ45 (6GK5788-1FC00-0AB0), SCALANCE W788-2 M12 (6GK5788-2GD00-0AA0), SCALANCE W788-2 M12 (6GK5788-2GD00-0AB0), SCALANCE W788-2 M12 EEC (6GK5788-2GD00-0TA0), SCALANCE W788-2 M12 EEC (6GK5788-2GD00-0TB0), SCALANCE W788-2 M12 EEC (6GK5788-2GD00-0TC0), SCALANCE W788-2 RJ45 (6GK5788-2FC00-0AA0), SCALANCE W788-2 RJ45 (6GK5788-2FC00-0AB0), SCALANCE W788-2 RJ45 (6GK5788-2FC00-0AC0), SINEMA Server V14: Currently no fix is planned
  • SIMATIC CP 1542SP-1 (6GK7542-6UX00-0XE0), SIMATIC CP 1543SP-1 (6GK7543-6WX00-0XE0), SIPLUS ET 200SP CP 1543SP-1 ISEC (6AG1543-6WX00-7XE0), SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL (6AG2543-6WX00-4XE0): Update to V2.2.28 or later version
  • SCALANCE X200-4P IRT (6GK5200-4AH00-2BA3), SCALANCE X201-3P IRT (6GK5201-3BH00-2BA3), SCALANCE X201-3P IRT PRO (6GK5201-3JR00-2BA6), SCALANCE X202-2IRT (6GK5202-2BB00-2BA3), SCALANCE X202-2P IRT (6GK5202-2BH00-2BA3), SCALANCE X202-2P IRT PRO (6GK5202-2JR00-2BA6), SCALANCE X204IRT (6GK5204-0BA00-2BA3), SCALANCE X204IRT PRO (6GK5204-0JA00-2BA6), SCALANCE XF201-3P IRT (6GK5201-3BH00-2BD2), SCALANCE XF202-2P IRT (6GK5202-2BH00-2BD2), SCALANCE XF204-2BA IRT (6GK5204-2AA00-2BD2), SCALANCE XF204IRT (6GK5204-0BA00-2BF2): Update to V5.5.2 or later version
  • SIMATIC CP 1242-7 V2 (6GK7242-7KX31-0XE0), SIMATIC CP 1243-1 (6GK7243-1BX30-0XE0), SIMATIC CP 1243-7 LTE EU (6GK7243-7KX30-0XE0), SIMATIC CP 1243-7 LTE US (6GK7243-7SX30-0XE0), SIMATIC CP 1243-8 IRC (6GK7243-8RX30-0XE0), SIPLUS NET CP 1242-7 V2 (6AG1242-7KX31-7XE0), SIPLUS S7-1200 CP 1243-1 (6AG1243-1BX30-2AX0), SIPLUS S7-1200 CP 1243-1 RAIL (6AG2243-1BX30-1XE0): Update to V3.3.46 or later version
  • SINEC NMS: Update to V1.0.3 or later version
  • SINEMA Remote Connect Server: Update to V3.1 or later version
  • SIMATIC CP 1545-1 (6GK7545-1GX00-0XE0): Update to V1.1 or later version
  • SINUMERIK Operate: Upgrade to V4.95 SP1 or later version SINUMERIK software can be obtained from your local Siemens account manager
  • SIMATIC S7-1200 CPU family (incl. SIPLUS variants): Update to V4.5.2 or later version
  • SIMATIC Process Historian OPC UA Server: Update to V2020 SP1 or later version
  • SIMATIC Process Historian OPC UA Server: For PCS neo customers: Update to PCS neo V3.1 SP1 ( https://support.industry.siemens.com/cs/ww/de/view/109807752/)
  • SIMATIC Process Historian OPC UA Server: For PCS 7 customers: Update to PCS 7 V9.1 SP1 ( https://support.industry.siemens.com/cs/ww/en/view/109805073/)
  • SIMATIC Process Historian OPC UA Server: For WinCC customers: contact local support
  • TIA Administrator: Update to V1.0 SP7 or later version
  • SCALANCE SC622-2C (6GK5622-2GS00-2AC2), SCALANCE SC632-2C (6GK5632-2GS00-2AC2), SCALANCE SC636-2C (6GK5636-2GS00-2AC2), SCALANCE SC642-2C (6GK5642-2GS00-2AC2), SCALANCE SC646-2C (6GK5646-2GS00-2AC2): Update to V2.3 or later version
  • SIMATIC CP 1543-1 (6GK7543-1AX00-0XE0), SIPLUS NET CP 1543-1 (6AG1543-1AX00-2XE0): Update to V3.0.22 or later version
  • RUGGEDCOM ROX MX5000, RUGGEDCOM ROX MX5000RE, RUGGEDCOM ROX RX1400, RUGGEDCOM ROX RX1500, RUGGEDCOM ROX RX1501, RUGGEDCOM ROX RX1510, RUGGEDCOM ROX RX1511, RUGGEDCOM ROX RX1512, RUGGEDCOM ROX RX1524, RUGGEDCOM ROX RX1536, RUGGEDCOM ROX RX5000: Update to V2.15.0 or later version
  • SCALANCE WAM766-1 (EU) (6GK5766-1GE00-7DA0), SCALANCE WAM766-1 (US) (6GK5766-1GE00-7DB0), SCALANCE WAM766-1 EEC (EU) (6GK5766-1GE00-7TA0), SCALANCE WAM766-1 EEC (US) (6GK5766-1GE00-7TB0), SCALANCE WUM766-1 (EU) (6GK5766-1GE00-3DA0), SCALANCE WUM766-1 (US) (6GK5766-1GE00-3DB0): Update to V1.2 or later version
  • SCALANCE X302-7 EEC (230V, coated) (6GK5302-7GD00-3GA3), SCALANCE X302-7 EEC (230V) (6GK5302-7GD00-3EA3), SCALANCE X302-7 EEC (24V, coated) (6GK5302-7GD00-1GA3), SCALANCE X302-7 EEC (24V) (6GK5302-7GD00-1EA3), SCALANCE X302-7 EEC (2x 230V, coated) (6GK5302-7GD00-4GA3), SCALANCE X302-7 EEC (2x 230V) (6GK5302-7GD00-4EA3), SCALANCE X302-7 EEC (2x 24V, coated) (6GK5302-7GD00-2GA3), SCALANCE X302-7 EEC (2x 24V) (6GK5302-7GD00-2EA3), SCALANCE X304-2FE (6GK5304-2BD00-2AA3), SCALANCE X306-1LD FE (6GK5306-1BF00-2AA3), SCALANCE X307-2 EEC (230V, coated) (6GK5307-2FD00-3GA3), SCALANCE X307-2 EEC (230V) (6GK5307-2FD00-3EA3), SCALANCE X307-2 EEC (24V, coated) (6GK5307-2FD00-1GA3), SCALANCE X307-2 EEC (24V) (6GK5307-2FD00-1EA3), SCALANCE X307-2 EEC (2x 230V, coated) (6GK5307-2FD00-4GA3), SCALANCE X307-2 EEC (2x 230V) (6GK5307-2FD00-4EA3), SCALANCE X307-2 EEC (2x 24V, coated) (6GK5307-2FD00-2GA3), SCALANCE X307-2 EEC (2x 24V) (6GK5307-2FD00-2EA3), SCALANCE X307-3 (6GK5307-3BL00-2AA3), SCALANCE X307-3 (6GK5307-3BL10-2AA3), SCALANCE X307-3LD (6GK5307-3BM00-2AA3), SCALANCE X307-3LD (6GK5307-3BM10-2AA3), SCALANCE X308-2 (6GK5308-2FL00-2AA3), SCALANCE X308-2 (6GK5308-2FL10-2AA3), SCALANCE X308-2LD (6GK5308-2FM00-2AA3), SCALANCE X308-2LD (6GK5308-2FM10-2AA3), SCALANCE X308-2LH (6GK5308-2FN00-2AA3), SCALANCE X308-2LH (6GK5308-2FN10-2AA3), SCALANCE X308-2LH+ (6GK5308-2FP00-2AA3), SCALANCE X308-2LH+ (6GK5308-2FP10-2AA3), SCALANCE X308-2M (6GK5308-2GG00-2AA2), SCALANCE X308-2M (6GK5308-2GG10-2AA2), SCALANCE X308-2M PoE (6GK5308-2QG00-2AA2), SCALANCE X308-2M PoE (6GK5308-2QG10-2AA2), SCALANCE X308-2M TS (6GK5308-2GG00-2CA2), SCALANCE X308-2M TS (6GK5308-2GG10-2CA2), SCALANCE X310 (6GK5310-0FA00-2AA3), SCALANCE X310 (6GK5310-0FA10-2AA3), SCALANCE X310FE (6GK5310-0BA00-2AA3), SCALANCE X310FE (6GK5310-0BA10-2AA3), SCALANCE X320-1 FE (6GK5320-1BD00-2AA3), SCALANCE X320-1-2LD FE (6GK5320-3BF00-2AA3), SCALANCE X408-2 (6GK5408-2FD00-2AA2), SCALANCE XR324-12M (230V, ports on front) (6GK5324-0GG00-3AR2), SCALANCE XR324-12M (230V, ports on front) (6GK5324-0GG10-3AR2), SCALANCE XR324-12M (230V, ports on rear) (6GK5324-0GG00-3HR2), SCALANCE XR324-12M (230V, ports on rear) (6GK5324-0GG10-3HR2), SCALANCE XR324-12M (24V, ports on front) (6GK5324-0GG00-1AR2), SCALANCE XR324-12M (24V, ports on front) (6GK5324-0GG10-1AR2), SCALANCE XR324-12M (24V, ports on rear) (6GK5324-0GG00-1HR2), SCALANCE XR324-12M (24V, ports on rear) (6GK5324-0GG10-1HR2), SCALANCE XR324-12M TS (24V) (6GK5324-0GG00-1CR2), SCALANCE XR324-12M TS (24V) (6GK5324-0GG10-1CR2), SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on front) (6GK5324-4GG00-3ER2), SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on front) (6GK5324-4GG10-3ER2), SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on rear) (6GK5324-4GG00-3JR2), SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on rear) (6GK5324-4GG10-3JR2), SCALANCE XR324-4M EEC (24V, ports on front) (6GK5324-4GG00-1ER2), SCALANCE XR324-4M EEC (24V, ports on front) (6GK5324-4GG10-1ER2), SCALANCE XR324-4M EEC (24V, ports on rear) (6GK5324-4GG00-1JR2), SCALANCE XR324-4M EEC (24V, ports on rear) (6GK5324-4GG10-1JR2), SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on front) (6GK5324-4GG00-4ER2), SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on front) (6GK5324-4GG10-4ER2), SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on rear) (6GK5324-4GG00-4JR2), SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on rear) (6GK5324-4GG10-4JR2), SCALANCE XR324-4M EEC (2x 24V, ports on front) (6GK5324-4GG00-2ER2), SCALANCE XR324-4M EEC (2x 24V, ports on front) (6GK5324-4GG10-2ER2), SCALANCE XR324-4M EEC (2x 24V, ports on rear) (6GK5324-4GG00-2JR2), SCALANCE XR324-4M EEC (2x 24V, ports on rear) (6GK5324-4GG10-2JR2), SCALANCE XR324-4M PoE (230V, ports on front) (6GK5324-4QG00-3AR2), SCALANCE XR324-4M PoE (230V, ports on rear) (6GK5324-4QG00-3HR2), SCALANCE XR324-4M PoE (24V, ports on front) (6GK5324-4QG00-1AR2), SCALANCE XR324-4M PoE (24V, ports on rear) (6GK5324-4QG00-1HR2), SCALANCE XR324-4M PoE TS (24V, ports on front) (6GK5324-4QG00-1CR2), SIPLUS NET SCALANCE X308-2 (6AG1308-2FL10-4AA3): Update to V4.1.4 or later version
  • Industrial Edge - PROFINET IO Connector: Use the Edge Management System to update to V1.1.1 or later version
  • RUGGEDCOM RM1224 LTE(4G) EU (6GK6108-4AM00-2BA2), RUGGEDCOM RM1224 LTE(4G) NAM (6GK6108-4AM00-2DA2), SCALANCE M804PB (6GK5804-0AP00-2AA2), SCALANCE M812-1 ADSL-Router (Annex A) (6GK5812-1AA00-2AA2), SCALANCE M812-1 ADSL-Router (Annex B) (6GK5812-1BA00-2AA2), SCALANCE M816-1 ADSL-Router (Annex A) (6GK5816-1AA00-2AA2), SCALANCE M816-1 ADSL-Router (Annex B) (6GK5816-1BA00-2AA2), SCALANCE M826-2 SHDSL-Router (6GK5826-2AB00-2AB2), SCALANCE M874-2 (6GK5874-2AA00-2AA2), SCALANCE M874-3 (6GK5874-3AA00-2AA2), SCALANCE M876-3 (EVDO) (6GK5876-3AA02-2BA2), SCALANCE M876-3 (ROK) (6GK5876-3AA02-2EA2), SCALANCE M876-4 (EU) (6GK5876-4AA00-2BA2), SCALANCE M876-4 (NAM) (6GK5876-4AA00-2DA2), SCALANCE MUM853-1 (EU) (6GK5853-2EA00-2DA1), SCALANCE MUM856-1 (EU) (6GK5856-2EA00-3DA1), SCALANCE MUM856-1 (RoW) (6GK5856-2EA00-3AA1), SCALANCE S615 (6GK5615-0AA00-2AA2): Update to V7.1 or later version
  • SIMATIC PCS neo (Administration Console): Update to V3.1 SP 1 or later version
  • SCALANCE W1748-1 M12 (6GK5748-1GY01-0AA0), SCALANCE W1748-1 M12 (6GK5748-1GY01-0TA0), SCALANCE W1788-1 M12 (6GK5788-1GY01-0AA0), SCALANCE W1788-2 EEC M12 (6GK5788-2GY01-0TA0), SCALANCE W1788-2 M12 (6GK5788-2GY01-0AA0), SCALANCE W1788-2IA M12 (6GK5788-2HY01-0AA0): Update to V3.0.0 or later version
  • SCALANCE X204-2 (6GK5204-2BB10-2AA3), SCALANCE X204-2FM (6GK5204-2BB11-2AA3), SCALANCE X204-2LD (6GK5204-2BC10-2AA3), SCALANCE X204-2LD TS (6GK5204-2BC10-2CA2), SCALANCE X204-2TS (6GK5204-2BB10-2CA2), SCALANCE X206-1 (6GK5206-1BB10-2AA3), SCALANCE X206-1LD (6GK5206-1BC10-2AA3), SCALANCE X208 (6GK5208-0BA10-2AA3), SCALANCE X208PRO (6GK5208-0HA10-2AA6), SCALANCE X212-2 (6GK5212-2BB00-2AA3), SCALANCE X212-2LD (6GK5212-2BC00-2AA3), SCALANCE X216 (6GK5216-0BA00-2AA3), SCALANCE X224 (6GK5224-0BA00-2AA3), SCALANCE XF204 (6GK5204-0BA00-2AF2), SCALANCE XF204-2 (6GK5204-2BC00-2AF2), SCALANCE XF206-1 (6GK5206-1BC00-2AF2), SCALANCE XF208 (6GK5208-0BA00-2AF2): Update to V5.2.6 or later version

As a general security measure, Siemens recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens' operational guidelines for industrial security and following recommendations in the product manuals.

Additional information on industrial security by Siemens can be found on the Siemens industrial security webpage.

For more information see the associated Siemens security advisory SSA-244969 in HTML and CSAF.

CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, such as:

  • Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.
  • Locate control system networks and remote devices behind firewalls and isolating them from business networks.
  • When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs). Recognize VPNs may have vulnerabilities, should be updated to the most recent version available, and are only as secure as the connected devices.

CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.

Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

CISA also recommends users take the following measures to protect themselves from social engineering attacks:

No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time. This vulnerability has a high attack complexity.

5. UPDATE HISTORY

  • September 16, 2025: Initial Republication of Siemens SSA-244969

This product is provided subject to this Notification and this Privacy & Use policy.

Vendor

  • Siemens

Tags

Sector: Critical Manufacturing Sector
Topics: Industrial Control System Vulnerabilities, Industrial Control Systems

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