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TI-2023-12306 Aliases CVE-2023-27596

OpenSIPS has vulnerability in the codec_delete_XX() functions

Priority MEDIUM 40CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-770.

Summary

OpenSIPS is a Session Initiation Protocol (SIP) server implementation. Prior to versions 3.1.8 and 3.2.5, OpenSIPS crashes when a malformed SDP body is sent multiple times to an OpenSIPS configuration that makes use of the `stream_process` function. This issue was discovered during coverage guided fuzzing of the function `codec_delete_except_re`. 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`. This issue has been fixed in version 3.1.8 and 3.2.5.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00738 54th percentileScored 2026-11-07
Fix Fixed opensips (OpenSIPS): 3.1.8, 3.2.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OpenSIPSopensipsbefore 3.1.8; 3.2.0 to before 3.2.53.1.8, 3.2.5Patch availableCNA
  • opensips VendorOpenSIPS Affected before 3.1.8; 3.2.0 to before 3.2.5 Fixed in 3.1.8, 3.2.5 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:opensips:opensips:*:*:*:*:*:*:*:*before 3.1.8; 3.2.0 to before 3.2.5VulnerableOpenSIPS
  • cpe:2.3:a:opensips:opensips:*:*:*:*:*:*:*:* Versions before 3.1.8; 3.2.0 to before 3.2.5 Vulnerable ·OpenSIPS

Remediation

  • Fix · CNA opensips (OpenSIPS) Fixed in 3.1.8, 3.2.5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-27596

References

Patch 1

Advisory 1

  • TI-2023-12676 OpenSIPS has vulnerability in the Content-Length Parser CVSS 3.1HIGH 7.5
  • TI-2023-12674 OpenSIPS has vulnerability in the building the local negative replies CVSS 3.1HIGH 7.5
  • TI-2023-12311 OpenSIPS has vulnerability in the codec_delete_XX() functions CVSS 3.1HIGH 7.5
  • TI-2023-12310 OpenSIPS has vulnerability in the codec_delete_XX() functions CVSS 3.1HIGH 7.5
  • TI-2023-12309 OpenSIPS has vulnerability in the parse_to_param() function CVSS 3.1HIGH 7.5
  • TI-2023-12308 OpenSIPS has vulnerability in the parse_via() function CVSS 3.1HIGH 7.5
See all 11 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences