CVE-2021-26717
- Source
- https://cve.org/CVERecord?id=CVE-2021-26717
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-26717.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2021-26717
- Downstream
- Published
- 2021-02-18T20:15:12Z
- Modified
- 2026-02-11T14:27:12Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
An issue was discovered in Sangoma Asterisk 16.x before 16.16.1, 17.x before 17.9.2, and 18.x before 18.2.1 and Certified Asterisk before 16.8-cert6. When re-negotiating for T.38, if the initial remote response was delayed just enough, Asterisk would send both audio and T.38 in the SDP. If this happened, and the remote responded with a declined T.38 stream, then Asterisk would crash.
- References
-
- http://packetstormsecurity.com/files/161471/Asterisk-Project-Security-Advisory-AST-2021-002.html
- http://seclists.org/fulldisclosure/2021/Feb/58
- https://downloads.asterisk.org/pub/security/
- https://downloads.asterisk.org/pub/security/AST-2021-002.html
- https://issues.asterisk.org/jira/browse/ASTERISK-29203
- https://issues.asterisk.org/jira/browse/ASTERISK-29203
- http://seclists.org/fulldisclosure/2021/Feb/58
- https://issues.asterisk.org/jira/browse/ASTERISK-29203
- http://seclists.org/fulldisclosure/2021/Feb/58