PT-2022-26510 · Sangoma+1 · Asterisk+1

Published 2020-07-06 · Updated 2023-02-24 · CVE-2022-42705

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Sangoma Asterisk versions 16.28 through 19.6 Sangoma Asterisk version certified/18.9-cert2

Description A use-after-free issue in the res pjsip pubsub.c module may allow a remote authenticated attacker to crash Asterisk, resulting in a denial of service. This can occur when the attacker performs activity on a subscription via a reliable transport at the same time that Asterisk is also performing activity on that subscription.

Recommendations For Sangoma Asterisk versions 16.28 through 19.6, update to a version that includes a fix for the use-after-free issue in the res pjsip pubsub.c module. For Sangoma Asterisk version certified/18.9-cert2, update to a version that includes a fix for the use-after-free issue in the res pjsip pubsub.c module. As a temporary workaround, consider restricting access to the res pjsip pubsub.c module to minimize the risk of exploitation.

Fix

DoS

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

ALT-PU-2020-2313

CVE-2022-42705

DLA-3335-1

DSA-5358-1

Affected Products

Alt Linux

Asterisk

References · 18

• https://ubuntu.com/security/CVE-2022-42705 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-3335-1 · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2022-42705 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-42705 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-42705 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-42705 · Security Note
• https://debian.org/security/2023/dsa-5358 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-42705 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2022-42705 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-42705 · Vendor Advisory
• https://downloads.asterisk.org/pub/security/AST-2022-008.html · Vendor Advisory
• https://osv.dev/vulnerability/DSA-5358-1 · Vendor Advisory
• https://t.me/cibsecurity/54038 · Telegram Post
• https://t.me/cvenotify/39369 · Telegram Post
• https://lists.debian.org/debian-lts-announce/2023/02/msg00029.html · Note