What’s Vulnerable › Vulnerabilities

CVE-2022-23608: Use after free in PJSIP

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 versions up to and including 2.11.1 when in a dialog set (or forking) scenario, a hash key shared by multiple UAC dialogs can potentially be prematurely freed when one of the dialogs is destroyed . The issue may cause a dialog set to be registered in the hash table multiple times (with different hash keys) leading to undefined behavior such as dialog list collision which eventually leading to endless loop. A patch is available in commit db3235953baa56d2fb0e276ca510fefca751643f which will be included in the next release. There are no known workarounds for this issue.

Affected products

How to fix

Upgrade to a fixed version: asterisk Certified Asterisk 16.8.0; asterisk 16.24.1, 18.10.1, 19.2.1. Check the vendor advisory for mitigations.

References

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