CVE-2022-42705

MEDIUM

Sangoma Asterisk 16.28, 18.14, 19.6, and certified/18.9-cert2 - Authenticated Use-After-Free in res_pjsip_pubsub.c

Title source: llm

Description

A use-after-free in res_pjsip_pubsub.c in Sangoma Asterisk 16.28, 18.14, 19.6, and certified/18.9-cert2 may allow a remote authenticated attacker to crash Asterisk (denial of service) by performing activity on a subscription via a reliable transport at the same time that Asterisk is also performing activity on that subscription.

References (3)

Core 3

Core References

Patch, Vendor Advisory

https://downloads.asterisk.org/pub/security/AST-2022-008.html

Mailing List mailing-list

https://lists.debian.org/debian-lts-announce/2023/02/msg00029.html

Third Party Advisory vendor-advisory

https://www.debian.org/security/2023/dsa-5358

Scores

CVSS v3 6.5

EPSS 0.0124

EPSS Percentile 65.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-416

Status published

Products (3)

sangoma/asterisk 20.0.0

sangoma/asterisk 16.0.0 - 16.29.1

sangoma/certified_asterisk 18.9 cert2

Published Dec 05, 2022

Tracked Since Feb 18, 2026