CVE-2023-27599

Date: March 15, 2023

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.

Language: C