Exploit Report

Computer Security And Bug Information


CVE Title
Published Date2023-03-15T21:15Z
Modified Date2023-03-21T19:14Z
CWE TypeCWE-908
DescriptionOpenSIPS 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.
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Reference URLhttps://github.com/OpenSIPS/opensips/commit/ab611f74f69d9c42be5401c40d56ea06a58f5dd7
Reference DescriptionMISC https://github.com/OpenSIPS/opensips/commit/ab611f74f69d9c42be5401c40d56ea06a58f5dd7
Reference URLhttps://github.com/OpenSIPS/opensips/security/advisories/GHSA-wxfg-3gwh-rhvx
Reference DescriptionMISC https://github.com/OpenSIPS/opensips/security/advisories/GHSA-wxfg-3gwh-rhvx
Reference URLhttps://opensips.org/pub/audit-2022/opensips-audit-technical-report-full.pdf
Reference DescriptionMISC https://opensips.org/pub/audit-2022/opensips-audit-technical-report-full.pdf
TagsPatch Third Party Advisory

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