Resource exhaustion in Opensips
CVE-2023-27596
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.007 (52.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Opensips — versions < 3.1.8, >= 3.2.0, < 3.2.5
Weakness classification (CWE)
References
- github.com/OpenSIPS/opensips/security/advisories/GHSA-3ghx-j39m-cw4f (Third Party Advisory)
- github.com/OpenSIPS/opensips/commit/dd051f8ed5ae3347fb1d556ced3c97822c9d8450 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-27596?
- CVE-2023-27596 is a high-severity vulnerability in Opensips, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2023-03-15.
- How severe is CVE-2023-27596?
- High severity. CVSS v3 base score is 7.5 out of 10.