OpenSIPS is a Session Initiation Protocol (SIP) server implementation. Prior to versions 3.1.7 and 3.2.4, sending a malformed `Via` header to OpenSIPS triggers a segmentation fault when the function `calc_tag_suffix` is called. A specially crafted `Via` header, which is deemed correct by the parser, will pass uninitialized strings to the function `MD5StringArray` which leads to the crash. Abuse of this vulnerability leads to Denial of Service due to a crash. Since the uninitialized string points to memory location `0x0`, no further exploitation appears to be possible. No special network privileges are required to perform this attack, as long as the OpenSIPS configuration makes use of functions such as `sl_send_reply` or `sl_gen_totag` that trigger the vulnerable code. This issue has been fixed in versions 3.1.7 and 3.2.4.
History

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2023-03-15T20:29:49.673Z

Updated: 2024-08-02T12:16:36.462Z

Reserved: 2023-03-04T01:03:53.637Z

Link: CVE-2023-27598

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2023-03-15T21:15:09.143

Modified: 2024-11-21T07:53:13.917

Link: CVE-2023-27598

cve-icon Redhat

No data.