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7.5 High

CVE-2025-40944 A vulnerability has been identified in SIMATIC ET 200AL IM 157-1 PN (6ES7157-1AB00-0AB0) (All versions), SIMATIC ET…

Description

A vulnerability has been identified in SIMATIC ET 200AL IM 157-1 PN (6ES7157-1AB00-0AB0) (All versions), SIMATIC ET 200MP IM 155-5 PN HF (6ES7155-5AA00-0AC0) (All versions >= V4.2.0), SIMATIC ET 200SP IM 155-6 MF HF (6ES7155-6MU00-0CN0) (All versions), SIMATIC ET 200SP IM 155-6 PN HA (incl. SIPLUS variants) (All versions < V1.3), SIMATIC ET 200SP IM 155-6 PN R1 (6ES7155-6AU00-0HM0) (All versions < V6.0.1), SIMATIC ET 200SP IM 155-6 PN/2 HF (6ES7155-6AU01-0CN0) (All versions >= V4.2.0 < V4.2.5), SIMATIC ET 200SP IM 155-6 PN/3 HF (6ES7155-6AU30-0CN0) (All versions < V4.2.2), SIMATIC PN/MF Coupler (6ES7158-3MU10-0XA0) (All versions), SIMATIC PN/PN Coupler (6ES7158-3AD10-0XA0) (All versions < V6.0.0), SIPLUS ET 200MP IM 155-5 PN HF (6AG1155-5AA00-2AC0) (All versions >= V4.2.0), SIPLUS ET 200MP IM 155-5 PN HF (6AG1155-5AA00-7AC0) (All versions >= V4.2.0), SIPLUS ET 200MP IM 155-5 PN HF T1 RAIL (6AG2155-5AA00-1AC0) (All versions >= V4.2.0), SIPLUS ET 200SP IM 155-6 PN HF (6AG1155-6AU01-2CN0) (All versions >= V4.2.0 < V4.2.5), SIPLUS ET 200SP IM 155-6 PN HF (6AG1155-6AU01-7CN0) (All versions >= V4.2.0 < V4.2.5), SIPLUS ET 200SP IM 155-6 PN HF T1 RAIL (6AG2155-6AU01-1CN0) (All versions >= V4.2.0 < V4.2.5), SIPLUS ET 200SP IM 155-6 PN HF TX RAIL (6AG2155-6AU01-4CN0) (All versions >= V4.2.0 < V4.2.5), SIPLUS NET PN/PN Coupler (6AG2158-3AD10-4XA0) (All versions < V6.0.0). Affected devices do not properly handle S7 protocol session disconnect requests. When receiving a valid S7 protocol Disconnect Request (COTP DR TPDU) on TCP port 102, the devices enter an improper session state. This could allow an attacker to cause the device to become unresponsive, leading to a denial-of-service condition that requires a power cycle to restore normal operation.

Affected products and versions

Product Affected versions Fixed in
SIMATIC ET 200AL IM 157-1 PN Versions not published
SIMATIC ET 200MP IM 155-5 PN HF 4.2 4.2.0 → latest No fix stated
SIMATIC ET 200SP IM 155-6 MF HF Versions not published
SIMATIC ET 200SP IM 155-6 PN HA (incl. SIPLUS variants) 1.3 earliest → < 1.3 1.3
SIMATIC ET 200SP IM 155-6 PN R1 6.0 earliest → < 6.0.1 6.0.1
SIMATIC ET 200SP IM 155-6 PN/2 HF 4.2 4.2.0 → < 4.2.5 4.2.5
SIMATIC ET 200SP IM 155-6 PN/3 HF 4.2 earliest → < 4.2.2 4.2.2
SIMATIC PN/MF Coupler Versions not published
SIMATIC PN/PN Coupler 6.0 earliest → < 6.0.0 6.0.0
Show the 6 other branches
Product Affected versions Fixed in
SIPLUS ET 200MP IM 155-5 PN HF 4.2 4.2.0 → latest No fix stated
SIPLUS ET 200MP IM 155-5 PN HF T1 RAIL 4.2 4.2.0 → latest No fix stated
SIPLUS ET 200SP IM 155-6 PN HF 4.2 4.2.0 → < 4.2.5 4.2.5
SIPLUS ET 200SP IM 155-6 PN HF T1 RAIL 4.2 4.2.0 → < 4.2.5 4.2.5
SIPLUS ET 200SP IM 155-6 PN HF TX RAIL 4.2 4.2.0 → < 4.2.5 4.2.5
SIPLUS NET PN/PN Coupler 6.0 earliest → < 6.0.0 6.0.0

References

Timeline

  1. Published
  2. Last modified

Other CVEs of SIMATIC ET 200AL IM 157-1 PN

The 10 CVEs of SIMATIC ET 200AL IM 157-1 PN →
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