What’s Vulnerable › Vulnerabilities

CVE-2023-50763

• Severity: medium (CVSS 4.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-06-11 · updated 2026-06-17
• Weakness: CWE-835

Description

A vulnerability has been identified in SIMATIC CP 1542SP-1 (6GK7542-6UX00-0XE0) (All versions < V2.3), SIMATIC CP 1542SP-1 IRC (6GK7542-6VX00-0XE0) (All versions < V2.3), SIMATIC CP 1543SP-1 (6GK7543-6WX00-0XE0) (All versions < V2.3), SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL (6AG2542-6VX00-4XE0) (All versions < V2.3), SIPLUS ET 200SP CP 1543SP-1 ISEC (6AG1543-6WX00-7XE0) (All versions < V2.3), SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL (6AG2543-6WX00-4XE0) (All versions < V2.3), SIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0) (All versions < V2.4.8), TIM 1531 IRC (6GK7543-1MX00-0XE0) (All versions < V2.4.8). The web server of affected products, if configured to allow the import of PKCS12 containers, could end up in an infinite loop when processing incomplete certificate chains. This could allow an authenticated remote attacker to create a denial of service condition by importing specially crafted PKCS12 containers.

Affected products

• Siemens SIMATIC CP 1542SP-1: before V2.3 — fixed in V2.3
• Siemens SIMATIC CP 1542SP-1 IRC: before V2.3 — fixed in V2.3
• Siemens SIMATIC CP 1543SP-1: before V2.3 — fixed in V2.3
• Siemens SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL: before V2.3 — fixed in V2.3
• Siemens SIPLUS ET 200SP CP 1543SP-1 ISEC: before V2.3 — fixed in V2.3
• Siemens SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL: before V2.3 — fixed in V2.3
• Siemens SIPLUS TIM 1531 IRC: before V2.4.8 — fixed in V2.4.8
• Siemens TIM 1531 IRC: before V2.4.8 — fixed in V2.4.8

How to fix

Upgrade to a fixed version: Siemens SIMATIC CP 1542SP-1 V2.3; Siemens SIMATIC CP 1542SP-1 IRC V2.3; Siemens SIMATIC CP 1543SP-1 V2.3; Siemens SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL V2.3; Siemens SIPLUS ET 200SP CP 1543SP-1 ISEC V2.3; Siemens SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL V2.3; Siemens SIPLUS TIM 1531 IRC V2.4.8; Siemens TIM 1531 IRC V2.4.8. Check the vendor advisory for mitigations.

References

• https://cert-portal.siemens.com/productcert/html/ssa-139628.html
• https://cert-portal.siemens.com/productcert/html/ssa-337522.html
• https://cert-portal.siemens.com/productcert/html/ssa-625862.html
• https://cert-portal.siemens.com/productcert/html/ssa-139628.html
• https://cert-portal.siemens.com/productcert/html/ssa-337522.html
• https://cert-portal.siemens.com/productcert/html/ssa-625862.html

Get alerted when CVE-2023-50763 or the next vulnerability affects your stack