CVE-2021-25664
Siemens · published 2021-04-22
Source record Collected from the National Vulnerability Database (NVD)
Description
Description by Siemens AG via the CVE Program.
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.
Status at the source
- NVD status: Modified
Affected products, as the source lists them
| Vendor | Product | Versions |
|---|---|---|
| Siemens | Capital Embedded AR Classic 431-422 | 0 – before *: affected |
| Siemens | Capital Embedded AR Classic R20-11 | 0 – before V2303: affected |
| Siemens | Nucleus NET | All versions: affected |
| Siemens | Nucleus ReadyStart V3 | 0 – before V2017.02.4: affected |
| Siemens | Nucleus ReadyStart V4 | 0 – before V4.1.0: affected |
| Siemens | Nucleus Source Code | 0 – before *: affected |
Products named in NVD's CPE match criteria (5)
cpe:2.3:a:siemens:capital_vstar:-:*:*:*:*:*:*:*cpe:2.3:a:siemens:nucleus_net:-:*:*:*:*:*:*:*cpe:2.3:a:siemens:nucleus_readystart_v3:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:nucleus_readystart_v4:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:nucleus_source_code:-:*:*:*:*:*:*:*
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 4.0: 8.7 HIGH — as published by Siemens AG (Secondary)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1: 7.5 HIGH — as published by Siemens AG (Secondary)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 3.1: 7.5 HIGH — as published by NIST (Primary)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0: 5 MEDIUM — as published by NIST (Primary)
AV:N/AC:L/Au:N/C:N/I:N/A:P
DeSpy does not score records. These are the sources' own values.
Weaknesses
Sources
References the source lists
- https://cert-portal.siemens.com/productcert/html/ssa-248289.html
- https://cert-portal.siemens.com/productcert/pdf/ssa-248289.pdf
- https://us-cert.cisa.gov/ics/advisories/icsa-21-103-05
- https://cert-portal.siemens.com/productcert/html/ssa-248289.html
- https://cert-portal.siemens.com/productcert/pdf/ssa-248289.pdf
- https://us-cert.cisa.gov/ics/advisories/icsa-21-103-05
Source dates: published 2021-04-22, last changed 2026-06-17. DeSpy's copy of this version is dated 2026-09-28.
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