Bug 2035052 (CVE-2021-37706) - CVE-2021-37706 pjproject: Header length is not checked in STUN message ERROR-CODE attribute
Summary: CVE-2021-37706 pjproject: Header length is not checked in STUN message ERROR-...
Alias: CVE-2021-37706
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 2035053 2035054
TreeView+ depends on / blocked
Reported: 2021-12-22 19:50 UTC by Pedro Sampaio
Modified: 2021-12-22 20:40 UTC (History)
1 user (show)

Fixed In Version:
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Last Closed: 2021-12-22 20:40:48 UTC

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Description Pedro Sampaio 2021-12-22 19:50:07 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 STUN message contains an ERROR-CODE attribute, the header length is not checked before performing a subtraction operation, potentially resulting in an integer underflow scenario. This issue affects all users that use STUN. A malicious actor located within the victim’s network may forge and send a specially crafted UDP (STUN) message that could remotely execute arbitrary code on the victim’s machine. Users are advised to upgrade as soon as possible. There are no known workarounds.


Comment 1 Pedro Sampaio 2021-12-22 19:50:23 UTC
Created pjproject tracking bugs for this issue:

Affects: epel-all [bug 2035054]
Affects: fedora-all [bug 2035053]

Comment 2 Product Security DevOps Team 2021-12-22 20:40:46 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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