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
Mailing lists
Exploits
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