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

CVE-2021-31881

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). When processing a DHCP OFFER message, the DHCP client application does not validate the length of the Vendor option(s), leading to Denial-of-Service conditions. (FSMD-2021-0008)

HIGH · CVSS 7.1 EPSS 0.01414
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-125Out-of-bounds Read
CWE-125Out-of-bounds Read
▤

Affected Products & Versions

10
siemens capital vstarall versions
siemens nucleus netall versions
siemens nucleus readystart v3< 2012.08
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

7.1
HIGH · 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:L/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
Intelligence Graph · click any node to traverse
CVETechnique ActorTool Family
drag to reposition · click any node to traverse · button top-right enlarges
External lookups - second-class, for what we don’t hold ourselves
NVDCVE.orgCISAVulnersExploit-DBGitHub PoCVulnCheck KEVGreyNoise
Vulnerabilities
CISA KEV catalog
CWE weaknesses
CAPEC attack patterns
Package vulnerabilities
Threat intelligence
Threat actors
Tools & malware
ATT&CK techniques
IOCs
Detection & defense
Sigma rules
YARA rules
Atomic Red Team tests
D3FEND countermeasures
Compliance
NIST 800-53
ISO 27001:2022
SOC 2 TSC
PCI-DSS v4.0
CIS Controls v8.1
About
All capabilities
Live statistics
Data sources
Privacy policy
Terms of service
threatengine.sh  ·  Open-source threat intelligence platform  ·  100+ authoritative sources  ·  Every fact traces to its origin