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High severity8.2NVD Advisory· Published Dec 27, 2021· Updated Jun 17, 2026

CVE-2021-43845

CVE-2021-43845

Description

PJSIP is a free and open source multimedia communication library. In version 2.11.1 and prior, if incoming RTCP XR message contain block, the data field is not checked against the received packet size, potentially resulting in an out-of-bound read access. This affects all users that use PJMEDIA and RTCP XR. A malicious actor can send a RTCP XR message with an invalid packet size.

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Affected products

6
  • Pjsip/Pjsip2 versions
    cpe:2.3:a:teluu:pjsip:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:teluu:pjsip:*:*:*:*:*:*:*:*range: <=2.11.1
    • (no CPE)range: <=2.11.1
  • Debian/linux3 versions
    cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
    • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
    • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
  • Pjsip/Pjprojectcpe-rescue
    Range: <= 2.11.1

Patches

Vulnerability mechanics

References

9

News mentions

0

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