CVE-2019-6963 — A heap-based buffer overflow in cosa_dhcpv4_dml

A heap-based buffer overflow in cosa_dhcpv4_dml.c in the RDK RDKB-20181217-1 CcspPandM module may allow attackers with login credentials to achieve remote code execution by crafting a long buffer in the "Comment" field of an IP reservation form in the admin panel. This

01What is this vulnerability?

A heap-based buffer overflow in cosa_dhcpv4_dml.c in the RDK RDKB-20181217-1 CcspPandM module may allow attackers with login credentials to achieve remote code execution by crafting a long buffer in the "Comment" field of an IP reservation form in the admin panel. This is related to the CcspCommonLibrary module.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2019-06-20T13:47:40.000Z
• Last modified: 2024-08-04T20:31:04.436Z

09References

• dojo.bullguard.com — https://dojo.bullguard.com/dojo-by-bullguard/blog/the-gateway-is-wide-open