Bug 2035065 (CVE-2021-43804) - CVE-2021-43804 pjproject: Unchecked length in RTCP BYE message leads to out-of-bound read
Summary: CVE-2021-43804 pjproject: Unchecked length in RTCP BYE message leads to out-o...
Alias: CVE-2021-43804
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 2035070 2035069
TreeView+ depends on / blocked
Reported: 2021-12-22 19:58 UTC by Pedro Sampaio
Modified: 2021-12-22 20:41 UTC (History)
1 user (show)

Fixed In Version:
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Last Closed: 2021-12-22 20:41:14 UTC

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Description Pedro Sampaio 2021-12-22 19:58:06 UTC
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.


Comment 1 Pedro Sampaio 2021-12-22 20:04:48 UTC
Created pjproject tracking bugs for this issue:

Affects: epel-all [bug 2035070]
Affects: fedora-all [bug 2035069]

Comment 2 Product Security DevOps Team 2021-12-22 20:41:13 UTC
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.

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