CVE-2022-42705: Use After Free
First published: Mon Dec 05 2022(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Sangoma Asterisk | >=16.0.0<16.29.1 | |
| Sangoma Asterisk | >=18.14.0<18.15.1 | |
| Sangoma Asterisk | >=19.6.0<19.7.1 | |
| Sangoma Asterisk | =20.0.0 | |
| Sangoma Certified Asterisk | =18.9-cert2 | |
| debian/asterisk | <=1:16.2.1~dfsg-1+deb10u2 | 1:16.28.0~dfsg-0+deb10u4 1:16.28.0~dfsg-0+deb11u3 1:20.5.2~dfsg+~cs6.13.40431414-1 |
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Reference Links
- https://downloads.asterisk.org/pub/security/AST-2022-008.html
- https://lists.debian.org/debian-lts-announce/2023/02/msg00029.html
- https://www.debian.org/security/2023/dsa-5358
- https://issues.asterisk.org/jira/browse/ASTERISK-30244
- https://git.asterisk.org/gitweb/?p=asterisk/asterisk.git;a=commit;h=7684c9e907fb85f5c58b025d9e385ad2600f12a2
- https://security-tracker.debian.org/tracker/CVE-2022-42705
Frequently Asked Questions
What is CVE-2022-42705?
CVE-2022-42705 is a use-after-free vulnerability in Sangoma Asterisk 16.28, 18.14, 19.6, and certified/18.9-cert2.
How does CVE-2022-42705 affect Sangoma Asterisk?
CVE-2022-42705 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 operations on the same subscription.
Which versions of Sangoma Asterisk are affected by CVE-2022-42705?
Sangoma Asterisk 16.28, 18.14, 19.6, and certified/18.9-cert2 are affected by CVE-2022-42705.
How can I mitigate the impact of CVE-2022-42705?
To mitigate the impact of CVE-2022-42705, it is recommended to update Sangoma Asterisk to the patched versions provided by the vendor.
Where can I find more information about CVE-2022-42705?
You can find more information about CVE-2022-42705 on the official Asterisk issue tracker (JIRA), the Asterisk security advisory, and the Asterisk Git repository.
- collector/nvd-index
- collector/security-tracker-debian
- agent/severity
- agent/weakness
- agent/author
- agent/type
- agent/event
- agent/references
- agent/description
- agent/softwarecombine
- agent/first-publish-date
- agent/remedy
- agent/last-modified-date
- agent/tags
- collector/mitre-cve
- source/MITRE
- vendor/sangoma
- canonical/sangoma asterisk
- version/sangoma asterisk/16.0.0
- version/sangoma asterisk/18.14.0
- version/sangoma asterisk/19.6.0
- version/sangoma asterisk/20.0.0
- canonical/sangoma certified asterisk
- version/sangoma certified asterisk/18.9-cert2
- package-manager/debian