Vulnerability Description
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 ACK message, the DHCP client application does not validate the length of the Vendor option(s), leading to Denial-of-Service conditions. (FSMD-2021-0013)
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Siemens | Capital Vstar | All versions |
| Siemens | Nucleus Net | All versions |
| Siemens | Nucleus Readystart V3 | < 2017.02.1 |
| Siemens | Nucleus Source Code | All versions |
| Siemens | Apogee Modular Building Controller Firmware | All versions |
| Siemens | Apogee Modular Building Controller | - |
| Siemens | Apogee Modular Equiment Controller Firmware | All versions |
| Siemens | Apogee Modular Equiment Controller | - |
| Siemens | Apogee Pxc Compact Firmware | All versions |
| Siemens | Apogee Pxc Compact | - |
| Siemens | Apogee Pxc Modular Firmware | All versions |
| Siemens | Apogee Pxc Modular | - |
| Siemens | Talon Tc Compact Firmware | All versions |
| Siemens | Talon Tc Compact | - |
| Siemens | Talon Tc Modular Firmware | All versions |
| Siemens | Talon Tc Modular | - |
Related Weaknesses (CWE)
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
FAQ
What is CVE-2021-31883?
CVE-2021-31883 is a vulnerability with a CVSS score of 7.1 (HIGH). 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 ACK message, the DHCP clien...
How severe is CVE-2021-31883?
CVE-2021-31883 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-31883?
Check the references section above for vendor advisories and patch information. Affected products include: Siemens Capital Vstar, Siemens Nucleus Net, Siemens Nucleus Readystart V3, Siemens Nucleus Source Code, Siemens Apogee Modular Building Controller Firmware.