Out-of-bounds Read Affecting asterisk package, versions <1:16.28.0~dfsg-0+deb11u1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.43% (76th percentile)

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  • Snyk IDSNYK-DEBIAN11-ASTERISK-2405714
  • published23 Dec 2021
  • disclosed22 Dec 2021

Introduced: 22 Dec 2021

CVE-2021-43804  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Debian:11 asterisk to version 1:16.28.0~dfsg-0+deb11u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream asterisk package and not the asterisk package as distributed by Debian. See How to fix? for Debian:11 relevant fixed versions and status.

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.

CVSS Scores

version 3.1