CVE-2021-31882
moderate-risk
Published 2021-11-09
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)
Do I need to act?
~
1.4% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.5/10
Medium
ADJACENT_NETWORK
/ LOW complexity
Affected Products (10)
Capital Vstar
Apogee Modular Building Controller Firmware
Apogee Modular Equiment Controller Firmware
Apogee Pxc Compact Firmware
Apogee Pxc Modular Firmware
Talon Tc Compact Firmware
Talon Tc Modular Firmware
Affected Vendors
References (9)
Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-044112.pdf
Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-114589.pdf
Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-044112.pdf
Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-114589.pdf
41
/ 100
moderate-risk
Severity
21/34 · High
Exploitability
4/34 · Minimal
Exposure
16/34 · Moderate