CVE-2021-31882
A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions < V2303).
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.52%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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)
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.52% probability · 73th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- siemens/capital vstar · siemens/nucleus net · siemens/nucleus readystart v3 · siemens/nucleus source code · siemens/apogee modular building controller firmware · siemens/apogee modular equiment controller firmware · siemens/apogee pxc compact firmware · siemens/apogee pxc modular firmware · siemens/talon tc compact firmware · siemens/talon tc modular firmware
- Source
- productcert@siemens.com
References
- 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
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.