{"api_version":"1","generated_at":"2026-07-16T05:22:15+00:00","cve":"CVE-2023-27599","urls":{"html":"https://cve.report/CVE-2023-27599","api":"https://cve.report/api/cve/CVE-2023-27599.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2023-27599","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-27599"},"summary":{"title":"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`. 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