CVE-2016-6271 Bzrtp Project CVE debrief

Who should care

Teams that ship or embed libbzrtp 1.0.0, 1.0.2, or 1.0.3, especially products that rely on Bzrtp for authenticated secure communications. Security, release engineering, and dependency-management teams should prioritize verification and upgrade planning.

Technical summary

NVD describes the issue as a missing HVI check on DHPart2 packet reception in libbzrtp 1.0.x before 1.0.4. The result is a network-reachable integrity problem (CVSS 3.0: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N) that can permit spoofing by a man-in-the-middle attacker. NVD maps the weakness to CWE-254 and lists affected CPEs for bzrtp_project:bzrtp versions 1.0.0, 1.0.2, and 1.0.3.

Defensive priority

High. The issue is remotely reachable, requires no privileges or user interaction, and can directly impact communication authenticity/integrity.

Recommended defensive actions

• Upgrade libbzrtp to 1.0.4 or later, since versions before 1.0.4 are described as vulnerable.
• Inventory applications and appliances that bundle or statically link libbzrtp, then confirm whether they use affected 1.0.0, 1.0.2, or 1.0.3 builds.
• Validate vendor advisories or patches for any downstream products that repackaged bzrtp, because dependency versioning may not be obvious from the product UI.
• If immediate upgrading is not possible, restrict exposure of affected endpoints and monitor for anomalous session setup or authentication failures while remediation is underway.

Evidence notes

This debrief is based on the NVD CVE record, which states the missing HVI check on DHPart2 reception and lists affected bzrtp_project:bzrtp versions. The supplied MITRE/NVD references include a GitHub commit marked as a patch and a SecurityFocus entry for additional record context. No exploit details or unverified claims were used.

Official resources