CVE-2023-27599 Information

Description

OpenSIPS is a Session Initiation Protocol (SIP) server implementation. Prior to versions 3.1.7 and 3.2.4 when the function append_hf handles a SIP message with a malformed To header a call to the function abort() is performed resulting in a crash. This is due to the following check in data_lump.c:399 in the function anchor_lump. An attacker abusing this vulnerability will crash OpenSIPS leading to Denial of Service. It affects configurations containing functions that make use of the affected code such as the function append_hf. This issue has been fixed in versions 3.1.7 and 3.2.4.

Reference

https://github.com/OpenSIPS/opensips/security/advisories/GHSA-qvj2-vqrg-f5jx https://github.com/OpenSIPS/opensips/commit/cb56694d290530ac308f44b453c18120b1c1109d https://opensips.org/pub/audit-2022/opensips-audit-technical-report-full.pdf