VDB
CVE-2021-26717
CVE-2021-26717
PUBLISHED
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.
EPSS 0.42% · 62.3th percentile
Risk Scores
EPSS Score
0.42%
62.3th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:22.04:LTS | asterisk | 0, *, 1:18.10.0~dfsg+~cs6.10.40431411-2 |
| Ubuntu:24.04:LTS | asterisk | 1:20.6.0~dfsg+~cs6.13.40431414-2build5, 1:20.5.0~dfsg+~cs6.13.40431414-1, 1:20.5.1~dfsg+~cs6.13.40431414-1 |
| Ubuntu:25.10 | asterisk | 0, *, 1:22.5.2~dfsg+~cs6.15.60671435-1 |
Timeline
- Feb 18, 2021 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 22, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Dec 27, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Feb 27, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- Jul 2, 2022 EPSS Score
- Sep 4, 2022 EPSS Score
- Nov 5, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2021-26717 third-party-advisory
- http://packetstormsecurity.com/files/161471/Asterisk-Project-Security-Advisory-AST-2021-002.html third-party-advisory
- http://seclists.org/fulldisclosure/2021/Feb/58 third-party-advisory
- https://downloads.asterisk.org/pub/security/ third-party-advisory
- https://downloads.asterisk.org/pub/security/AST-2021-002.html third-party-advisory
- https://issues.asterisk.org/jira/browse/ASTERISK-29203 third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-26717 third-party-advisory