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Vulnerability · Published Apr 6, 2022 · Assigned by GitHub_M

CVE-2022-24793Potential heap buffer overflow when parsing DNS packets in PJSIP

High 7.5

In plain English

A high-severity buffer overflow in pjproject from pjsip. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.2% (higher than 82% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)2.2%top 17.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

PJSIP is a free and open source multimedia communication library written in C. A buffer overflow vulnerability in versions 2.12 and prior affects applications that use PJSIP DNS resolution. It doesn't affect PJSIP users who utilize an external resolver. This vulnerability is related to CVE-2023-27585. The difference is that this issue is in parsing the query record `parse_rr()`, while the issue in CVE-2023-27585 is in `parse_query()`. A patch is available in the `master` branch of the `pjsip/pjproject` GitHub repository. A workaround is to disable DNS resolution in PJSIP config (by setting `nameserver_count` to zero) or use an external resolver instead.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20pjproject2.12.1-r0ALPINE-CVE-2022-24793
Alpine:v3.21pjproject2.12.1-r0ALPINE-CVE-2022-24793
Alpine:v3.22pjproject2.12.1-r0ALPINE-CVE-2022-24793
Alpine:v3.23pjproject2.12.1-r0ALPINE-CVE-2022-24793
Alpine:v3.24pjproject2.12.1-r0ALPINE-CVE-2022-24793
Debian:14asterisk1:18.14.0~~rc1~dfsg+~cs6.12.40431414-1DEBIAN-CVE-2022-24793
Debian:12ring20230206.0~ds1-1DEBIAN-CVE-2022-24793

Affected products (as reported)

VendorProductVersions
pjsip pjproject <= 2.12

Weakness: CWE-120 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References