| 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 983157 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| asterisk (PTS) | jessie, jessie (lts) | 1:11.13.1~dfsg-2+deb8u8 | vulnerable |
| stretch (security) | 1:13.14.1~dfsg-2+deb9u6 | fixed | |
| stretch (lts), stretch | 1:13.14.1~dfsg-2+deb9u9 | fixed | |
| buster | 1:16.2.1~dfsg-1+deb10u2 | fixed | |
| buster (security) | 1:16.28.0~dfsg-0+deb10u4 | fixed | |
| bullseye | 1:16.28.0~dfsg-0+deb11u3 | fixed | |
| bullseye (security) | 1:16.28.0~dfsg-0+deb11u4 | fixed | |
| sid | 1:20.6.0~dfsg+~cs6.13.40431414-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| asterisk | source | jessie | (unfixed) | end-of-life | ||
| asterisk | source | stretch | (not affected) | |||
| asterisk | source | buster | (not affected) | |||
| asterisk | source | (unstable) | 1:16.16.1~dfsg-1 | 983157 |
[buster] - asterisk <not-affected> (Introduced in 16.15.0)
[stretch] - asterisk <not-affected> (Introduced in 16.15.0)
https://downloads.asterisk.org/pub/security/AST-2021-002.html