Use After Free in Sangoma Asterisk
CVE-2022-42705
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.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.013 (68.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.013 · change: +0.000
Affected products
- Sangoma Asterisk — versions 20.0.0
- Sangoma Certified Asterisk — versions 18.9
Weakness classification (CWE)
References
- downloads.asterisk.org/pub/security/AST-2022-008.html (Patch, Vendor Advisory)
- lists.debian.org/debian-lts-announce/2023/02/msg00029.html (mailing-list)
- www.debian.org/security/2023/dsa-5358 (vendor-advisory)
Frequently asked questions
- What is CVE-2022-42705?
- CVE-2022-42705 is a medium-severity vulnerability in Sangoma Asterisk, classified under Use After Free. CVSS score: 6.5/10. Published 2022-12-05.
- How severe is CVE-2022-42705?
- Medium severity. CVSS v3 base score is 6.5 out of 10.