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.
The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.
| Link | Tags |
|---|---|
| https://github.com/pjsip/pjproject/security/advisories/GHSA-p6g5-v97c-w5q4 | third party advisory patch |
| https://github.com/pjsip/pjproject/commit/9fae8f43accef8ea65d4a8ae9cdf297c46cfe29a | third party advisory patch |
| https://lists.debian.org/debian-lts-announce/2022/05/msg00047.html | third party advisory mailing list |
| https://security.gentoo.org/glsa/202210-37 | third party advisory vendor advisory |
| https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html | third party advisory mailing list |
| https://www.debian.org/security/2022/dsa-5285 | third party advisory vendor advisory |
| https://lists.debian.org/debian-lts-announce/2023/08/msg00038.html | mailing list |