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CVE-2021-37706

HIGH

7.3

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 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.

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

asterisk:certified_asteriskdebian:debian_linuxsangoma:asteriskteluu:pjsip

Weaknesses (CWE)

CWE-191CWE-191

References

http://packetstormsecurity.com/files/166225/Asterisk-Project-Security-Advisory-AST-2022-004.html(security-advisories@github.com)

http://seclists.org/fulldisclosure/2022/Mar/0(security-advisories@github.com)

https://github.com/pjsip/pjproject/commit/15663e3f37091069b8c98a7fce680dc04bc8e865(security-advisories@github.com)

https://github.com/pjsip/pjproject/security/advisories/GHSA-2qpg-f6wf-w984(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)

http://packetstormsecurity.com/files/166225/Asterisk-Project-Security-Advisory-AST-2022-004.html(af854a3a-2127-422b-91ae-364da2661108)

http://seclists.org/fulldisclosure/2022/Mar/0(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/pjsip/pjproject/commit/15663e3f37091069b8c98a7fce680dc04bc8e865(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/pjsip/pjproject/security/advisories/GHSA-2qpg-f6wf-w984(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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