OpenSIPS is a Session Initiation Protocol (SIP) server implementation. Prior to versions 3.1.7 and 3.2.4, OpenSIPS crashes when a malformed SDP body is received and is processed by the `delete_sdp_line` function in the sipmsgops module. This issue can be reproduced by calling the function with an SDP body that does not terminate by a line feed (i.e. `\n`).
The vulnerability was found while performing black-box fuzzing against an OpenSIPS server running a configuration that made use of the functions `codec_delete_except_re` and `codec_delete_re`. The same issue was also discovered while performing coverage guided fuzzing on the function `codec_delete_except_re`. The crash happens because the function `delete_sdp_line` expects that an SDP line is terminated by a line feed (`\n`):
By abusing this vulnerability, an attacker is able to crash the server. It affects configurations containing functions that rely on the affected code, such as the function `codec_delete_except_re`. Due to the sanity check that is performed in the `del_lump` function, exploitation of this issue will generate an `abort` in the lumps processing function, resulting in a Denial of Service. This issue has been fixed in versions 3.1.7 and 3.2.4.
References
Link | Resource |
---|---|
https://github.com/OpenSIPS/opensips/commit/8f87c7c03da55f9c79bd92e67fa2c94b2a7ce5cf | Patch Third Party Advisory |
https://github.com/OpenSIPS/opensips/security/advisories/GHSA-xj5x-g52f-548h | Third Party Advisory |
https://opensips.org/docs/modules/3.3.x/sipmsgops.html | Vendor Advisory |
https://opensips.org/pub/audit-2022/opensips-audit-technical-report-full.pdf | Vendor Advisory |
History
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MITRE Information
Status: PUBLISHED
Assigner: GitHub_M
Published: 2023-03-15T21:32:56.061Z
Updated: 2023-03-15T21:32:56.061Z
Reserved: 2023-03-04T01:03:53.637Z
Link: CVE-2023-27601
JSON object: View
NVD Information
Status : Modified
Published: 2023-03-15T22:15:10.357
Modified: 2023-11-07T04:10:01.887
Link: CVE-2023-27601
JSON object: View
Redhat Information
No data.
CWE