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FreeBSD: VID-964C5460-9C66-11EC-AD3A-001999F8D30B (CVE-2021-37706): asterisk -- multiple vulnerabilities

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FreeBSD: VID-964C5460-9C66-11EC-AD3A-001999F8D30B (CVE-2021-37706): asterisk -- multiple vulnerabilities

Severity
9
CVSS
(AV:N/AC:M/Au:N/C:C/I:C/A:C)
Published
12/22/2021
Created
11/08/2022
Added
11/04/2022
Modified
11/04/2022

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.

Solution(s)

  • freebsd-upgrade-package-asterisk16
  • freebsd-upgrade-package-asterisk18

References

  • CVE-2021-37706

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