Description
A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions < V2303), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.4), Nucleus ReadyStart V4 (All versions < V4.1.0), Nucleus Source Code (All versions including affected IPv6 stack). The function that processes the Hop-by-Hop extension header in IPv6 packets and its options lacks any checks against the length field of the header, allowing attackers to put the function into an infinite loop by supplying arbitrary length values.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Siemens | Capital Embedded AR Classic 431-422 | — | — |
| Siemens | Capital Embedded AR Classic R20-11 | < V2303 | V2303 |
| Siemens | Nucleus NET | All versions | — |
| Siemens | Nucleus ReadyStart V3 | < V2017.02.4 | V2017.02.4 |
| Siemens | Nucleus ReadyStart V4 | < V4.1.0 | V4.1.0 |
| Siemens | Nucleus Source Code | — | — |
Advisories 3
- ICSA-21-103-05 Siemens Nucleus Products IPv6 Stack CISA ICS & IT advisories · Mar 11, 2025
- SSA-248289 SSA-248289: Denial of Service Vulnerabilities in the IPv6 Stack of Nucleus RTOS Siemens ProductCERT · Mar 11, 2025
- WID-SEC-2023-1986 NAME:WRECK: Mehrere Schwachstellen in TCP/IP Stacks BSI CERT-Bund (WID) · Feb 12, 2024