When loading the shared library that provides the OTR protocol implementation, Thunderbird will initially attempt to open it using a filename that isn't distributed by Thunderbird. If a computer has already been infected with a malicious library of the alternative filename, and the malicious library has been copied to a directory that is contained in the search path for executable libraries, then Thunderbird will load the incorrect library. This vulnerability affects Thunderbird < 78.9.1.
The product uses a fixed or controlled search path to find resources, but one or more locations in that path can be under the control of unintended actors.
| Link | Tags |
|---|---|
| https://www.mozilla.org/security/advisories/mfsa2021-13/ | release notes vendor advisory |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1682101 | permissions required vendor advisory |