CVE-2023-27600 — OpenSIPS is a Session Initiation Protocol (SIP) server implementation
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
Published
2023-03-15T21:14:33.131Z
Last modified
2025-02-25T14:56:44.542Z
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
01What is this vulnerability?
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`).
02Affected products
| Vendor | Product | Versions |
|---|
| OpenSIPS | opensips | < 3.1.7, >= 3.2.0, < 3.2.4 |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2023-03-15T21:14:33.131Z
- Last modified: 2025-02-25T14:56:44.542Z
09References
- github.com — https://github.com/OpenSIPS/opensips/security/advisories/GHSA-67w7-g4j8-3wcx
- github.com — https://github.com/OpenSIPS/opensips/commit/c6ab3bb406c447e30c7d33a1a8970048b461…
- opensips.org — https://opensips.org/docs/modules/3.3.x/sipmsgops.html
- opensips.org — https://opensips.org/pub/audit-2022/opensips-audit-technical-report-full.pdf
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