High severity7.5NVD Advisory· Published Mar 15, 2023· Updated Jun 17, 2026
CVE-2023-27599
CVE-2023-27599
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.
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Affected products
3Patches
Vulnerability mechanics
References
3- github.com/OpenSIPS/opensips/commit/cb56694d290530ac308f44b453c18120b1c1109dnvdPatchThird Party Advisory
- github.com/OpenSIPS/opensips/security/advisories/GHSA-qvj2-vqrg-f5jxnvdThird Party Advisory
- opensips.org/pub/audit-2022/opensips-audit-technical-report-full.pdfnvdThird Party Advisory
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