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cve/2021/CVE-2021-26717.md
0xMarcio cb00e1339f Update CVE list 2025-09-29 21:09
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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.

POC

Reference

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