CVE-2022-42705 — Use After Free in Asterisk

CWE-416 — Use After Free6 documents5 sources
Severity
6.5MEDIUMNVD
EPSS
1.6%
top 18.45%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Sangoma AsteriskDebian AsteriskSangoma Certified Asterisk
Timeline
PublishedDec 5

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6

Affected Packages4 packages

▶NVDsangoma/asterisk16.0.0 — 16.29.1+3
▶Debiansangoma/asterisk< 1:16.28.0~dfsg-0+deb11u2
▶debiandebian/asterisk< asterisk 1:16.28.0~dfsg-0+deb11u2 (bullseye)

Patches

Patch: downloads.asterisk.org ↗Patch: downloads.asterisk.org ↗

🔴Vulnerability Details

2
GHSA
GHSA-89gw-96wv-f4r4: A use-after-free in res_pjsip_pubsub↗2022-12-05
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OSV
CVE-2022-42705: A use-after-free in res_pjsip_pubsub↗2022-12-05
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📋Vendor Advisories

1
Debian
CVE-2022-42705: asterisk - A use-after-free in res_pjsip_pubsub.c in Sangoma Asterisk 16.28, 18.14, 19.6, a...↗2022
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💬Community

2
Bugzilla
CVE-2022-42705 asterisk: Use after free in res_pjsip_pubsub.c [epel-8]↗2022-12-05
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Bugzilla
CVE-2022-42705 asterisk: Use after free in res_pjsip_pubsub.c [fedora-all]↗2022-12-05
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CVE-2022-42705 — Use After Free in Sangoma Asterisk | cvebase