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AUSCERT External Security Bulletin Redistribution
ESB-2022.6288
Asterisk Project Security Advisory - AST-2022-008
2 December 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Asterisk Open Source
Certified Asterisk
Publisher: Asterisk
Operating System: UNIX variants (UNIX, Linux, OSX)
Resolution: Patch/Upgrade
CVE Names: CVE-2022-42705
Original Bulletin:
http://downloads.asterisk.org/pub/security/AST-2022-008.html
Comment: CVSS (Max): None available when published
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Asterisk Project Security Advisory AST-2022-008
Product Asterisk
Summary Use after free in res_pjsip_pubsub.c
Nature of Advisory Denial of Service
Susceptibility Remote Authenticated Sessions
Severity Minor
Exploits Known No
Reported On September 23, 2022
Reported By Nappsoft
Posted On
Last Updated On November 29, 2022
Advisory Contact g joseph AT sangoma DOT com
CVE Name CVE-2022-42705
Description Use after free in res_pjsip_pubsub.c 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 Asterisk is also
performing activty on that subscription.
Modules Affected res_pjsip_pubsub.c, res_pjsip_outbound_registration.c,
pjsip_transport_events.c
Resolution Modules have been updated to ensure concurrent activity is properly serialized
to prevent the use-after-free.
Affected Versions
Product Release Series
Asterisk Open Source 16.x All Versions
Asterisk Open Source 18.x All Versions
Asterisk Open Source 19.x All Versions
Asterisk Open Source 20.x All Versions
Certified Asterisk 18.9 All Versions
Corrected In
Product Release
Asterisk Open Source 6.29.1
Asterisk Open Source 18.15.1
Asterisk Open Source 19.7.1
Asterisk Open Source 20.0.1
Certified Asterisk 18.9-cert3
Patches
Patch URL Revision
https://downloads.digium.com/pub/security/ Asterisk 16
AST-2022-008 -16.diff
https://downloads.digium.com/pub/security/ Asterisk 18
AST-2022-008 -18.diff
https://downloads.digium.com/pub/security/ Asterisk 19
AST-2022-008 -19.diff
https://downloads.digium.com/pub/security/ Asterisk 20
AST-2022-008 -20.diff
https://downloads.digium.com/pub/security/ Certified Asterisk 18.9
AST-2022-008 -18.9.diff
Links https://issues.asterisk.org/jira/browse/ASTERISK-30244
https://downloads.asterisk.org/pub/security/ AST-2022-008 .html
Asterisk Project Security Advisories are posted at https://www.asterisk.org/
security
This document may be superseded by later versions; if so, the latest version
will be posted at https://downloads.digium.com/pub/security/ AST-2022-008 .pdf
and https://downloads.digium.com/pub/security/ AST-2022-008 .html
Revision History
Date Editor Revisions Made
November 29, 2022 George Joseph Initial Revision
Asterisk Project Security Advisory AST-2022-008
Copyright (C) 2022 Sangoma Technologies , Inc. All Rights Reserved.
Permission is hereby granted to distribute and publish this advisory in its
original, unaltered form.
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