CVE-2021-26717

Name
CVE-2021-26717
Description
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.
NVD Severity
medium
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
Vendor Advisory https://downloads.asterisk.org/pub/security/
Mailing List http://seclists.org/fulldisclosure/2021/Feb/58
Issue Tracking https://issues.asterisk.org/jira/browse/ASTERISK-29203
Vendor Advisory https://downloads.asterisk.org/pub/security/AST-2021-002.html
Third Party Advisory http://packetstormsecurity.com/files/161471/Asterisk-Project-Security-Advisory-AST-2021-002.html

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:* asterisk >= 16.0.0 < 16.16.1
cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:* asterisk >= 17.0.0 < 17.9.2
cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:* asterisk >= 18.0 < 18.2.1
cpe:2.3:a:digium:certified_asterisk:16.8:-:*:*:*:*:*:* certified_asterisk == None == 16.8

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
asterisk 3.10-main 16.3.0-r3 Timo Teras <timo.teras@iki.fi> possibly vulnerable
asterisk 3.11-main 16.6.2-r1 Timo Teras <timo.teras@iki.fi> possibly vulnerable