Vulnerability in Siemens Capital Embedded Ar Classic 431-422
CVE-2021-25664
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.
EPSS: 0.019 (78.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Siemens Capital Embedded Ar Classic 431-422 — versions 0
- Siemens Capital Embedded Ar Classic R20-11 — versions 0
- Siemens Capital_vstar
- Siemens Nucleus Net — versions All versions
- Siemens Nucleus_net
- Siemens Nucleus Readystart V3 — versions 0
- Siemens Nucleus_readystart_v3
- Siemens Nucleus Readystart V4 — versions 0
- Siemens Nucleus_readystart_v4
- Siemens Nucleus Source Code — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- productcert@siemens.com (x_refsource_MISC, Vendor Advisory)
- productcert@siemens.com (US Government Resource, Third Party Advisory, x_refsource_MISC)
- productcert@siemens.com
Frequently asked questions
- What is CVE-2021-25664?
- CVE-2021-25664 is a high-severity vulnerability in Siemens Capital Embedded Ar Classic 431-422, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2021-04-22.
- How severe is CVE-2021-25664?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-25664 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.