CVE-2026-46334
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Summary
OpenSIPS is a Session Initiation Protocol (SIP) server implementation. Versions prior to 3.6.6 and 4.0.0-rc1 contain a denial of service vulnerability in the SDP bandwidth-line parsing logic. A SIP request with Content-Type: application/sdp and a malformed session-level SDP bandwidth line missing the required colon delimiter can corrupt parsed SDP bandwidth metadata. When a route or module subsequently clones the corrupted SDP state, as occurs with dialog and QoS processing, the OpenSIPS worker process crashes. An unauthenticated remote attacker can therefore trigger a crash in any configuration whose routing script parses attacker-controlled SDP and applies dialog/QoS processing. This issue has been fixed in versions 3.6.6 and 4.0.0-rc1.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| OpenSIPS | opensips | >= 3.4.0, < 3.6.6 | affected |
| OpenSIPS | opensips | >= 4.0.0-beta, < 4.0.0-rc1 | affected |
Weaknesses
- CWE-476: CWE-476: NULL Pointer Dereference
- CWE-20: CWE-20: Improper Input Validation
References
- https://github.com/OpenSIPS/opensips/security/advisories/GHSA-rh36-mhpv-cx2r
- https://github.com/OpenSIPS/opensips/commit/8fe74b01f6fbf86c0b5e290735275530cb65e0fb
- https://github.com/OpenSIPS/opensips/commit/ac5309d5b8206cd3dbe1b4e01567c8db1ce31444
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