CVEvulnerability
CVE-2021-26906
5.9 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2021-02-18
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.9 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 4.3 MEDIUM — AV:N/AC:M/Au:N/C:N/I:N/A:P
- Weaknesses
- CWE-404
Description
An issue was discovered in res_pjsip_session.c in Digium Asterisk through 13.38.1; 14.x, 15.x, and 16.x through 16.16.0; 17.x through 17.9.1; and 18.x through 18.2.0, and Certified Asterisk through 16.8-cert5. An SDP negotiation vulnerability in PJSIP allows a remote server to potentially crash Asterisk by sending specific SIP responses that cause an SDP negotiation failure.
Affected configurations
• digium asterisk (>= 13.0.0 < 13.38.2)
• digium asterisk (>= 16.0.0 < 16.16.1)
• digium asterisk (>= 17.0.0 < 17.9.2)
• digium asterisk (>= 18.0 < 18.2.1)
• digium certified asterisk 16.8
Related
Weakness · CWE (1)
- CWE-404 Improper Resource Shutdown or Release weakness
References
- http://packetstormsecurity.com/files/161477/Asterisk-Project-Security-Advisory-AST-2021-005.html Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Feb/61 Mailing List, Patch, Third Party Advisory
- https://downloads.asterisk.org/pub/security/ Vendor Advisory
- https://downloads.asterisk.org/pub/security/AST-2021-005.html Vendor Advisory
- https://issues.asterisk.org/jira/browse/ASTERISK-29196 Issue Tracking, Patch, Vendor Advisory
- http://packetstormsecurity.com/files/161477/Asterisk-Project-Security-Advisory-AST-2021-005.html Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Feb/61 Mailing List, Patch, Third Party Advisory
- https://downloads.asterisk.org/pub/security/ Vendor Advisory
- https://downloads.asterisk.org/pub/security/AST-2021-005.html Vendor Advisory
- https://issues.asterisk.org/jira/browse/ASTERISK-29196 Issue Tracking, Patch, Vendor Advisory