Home/CVE/A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R
CVE

CVE-2021-31882

A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R

A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions < V2303). The DHCP client application does not validate the length of the Domain Name Server IP option(s) (0x06) when processing DHCP ACK packets. This may lead to Denial-of-Service conditions.

(FSMD-2021-0011)

MEDIUM · CVSS 6.5 EPSS 0.01414
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
▤

Affected Products & Versions

10
siemens capital vstarall versions
siemens nucleus netall versions
siemens nucleus readystart v3< 2017.02.1
siemens nucleus source codeall versions
siemens apogee modular building controller firmwareall versions
siemens apogee modular equiment controller firmwareall versions
siemens apogee pxc compact firmwareall versions
siemens apogee pxc modular firmwareall versions
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · productcert@siemens.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD09 Nov 2021 · 12:15 PM
CVSS VectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

6
siemens-csafSSA-620288
siemens-csafSSA-114589
siemens-csafSSA-044112
cisa-csafcisa-csaf-csaf_files-OT-white-2021-icsa-21-313-03
cisa-csafcisa-csaf-csaf_files-OT-white-2021-icsa-21-315-07
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://cert-portal.siemens.com/productcert/html/ssa-044112.html
https://cert-portal.siemens.com/productcert/html/ssa-114589.html
https://cert-portal.siemens.com/productcert/html/ssa-620288.html
https://cert-portal.siemens.com/productcert/pdf/ssa-044112.pdfVendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-114589.pdfVendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-620288.pdf
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