| Name | CVE-2021-32919 |
| Description | An issue was discovered in Prosody before 0.11.9. The undocumented dialback_without_dialback option in mod_dialback enables an experimental feature for server-to-server authentication. It does not correctly authenticate remote server certificates, allowing a remote server to impersonate another server (when this option is enabled). |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-4916-1 |
| Debian Bugs | 988668 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| prosody (PTS) | jessie, jessie (lts) | 0.9.7-2+deb8u4 | vulnerable |
| stretch (security), stretch (lts), stretch | 0.9.12-2+deb9u4 | fixed |
| buster (security), buster, buster (lts) | 0.11.2-1+deb10u4 | fixed |
| bullseye (security), bullseye | 0.11.9-2+deb11u2 | fixed |
| bookworm | 0.12.3-1 | fixed |
| sid, trixie | 0.12.4-2 | fixed |
The information below is based on the following data on fixed versions.
Notes
[stretch] - prosody <not-affected> (Vulnerable code (=dwd) introduced later)
https://www.openwall.com/lists/oss-security/2021/05/13/1
https://prosody.im/security/advisory_20210512.txt
https://hg.prosody.im/trunk/rev/6be890ca492e
https://hg.prosody.im/trunk/rev/d0e9ffccdef9