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CVE-2021-43804
HIGH7.3
Description
PJSIP is a free and open source multimedia communication library written in C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. In affected versions if the incoming RTCP BYE message contains a reason's length, this declared length is not checked against the actual received packet size, potentially resulting in an out-of-bound read access. This issue affects all users that use PJMEDIA and RTCP. A malicious actor can send a RTCP BYE message with an invalid reason length. Users are advised to upgrade as soon as possible. There are no known workarounds.
CVE Details
CVSS v3.1 Score7.3
SeverityHIGH
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack VectorNETWORK
ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
Published12/22/2021
Last Modified11/4/2025
Sourcenvd
Honeypot Sightings0
Affected Products
debian:debian_linuxteluu:pjsip
Weaknesses (CWE)
CWE-125CWE-125
References
https://github.com/pjsip/pjproject/commit/8b621f192cae14456ee0b0ade52ce6c6f258af1e(security-advisories@github.com)
https://github.com/pjsip/pjproject/security/advisories/GHSA-3qx3-cg72-wrh9(security-advisories@github.com)
https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html(security-advisories@github.com)
https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html(security-advisories@github.com)
https://lists.debian.org/debian-lts-announce/2023/08/msg00038.html(security-advisories@github.com)
https://security.gentoo.org/glsa/202210-37(security-advisories@github.com)
https://www.debian.org/security/2022/dsa-5285(security-advisories@github.com)
https://github.com/pjsip/pjproject/commit/8b621f192cae14456ee0b0ade52ce6c6f258af1e(af854a3a-2127-422b-91ae-364da2661108)
https://github.com/pjsip/pjproject/security/advisories/GHSA-3qx3-cg72-wrh9(af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html(af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html(af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2023/08/msg00038.html(af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2024/09/msg00030.html(af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/202210-37(af854a3a-2127-422b-91ae-364da2661108)
https://www.debian.org/security/2022/dsa-5285(af854a3a-2127-422b-91ae-364da2661108)
IOC Correlations
No correlations recorded
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