Thunderbird: When loading the shared library that provides the OTR protocol implementation, Thunderbird will initially…
CVE-2021-29949 is fixed in 7 products on 2 platforms, first by RHSA-2021:1193, released April 14, 2021. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Mozilla Thunderbird (en-US) | 78.10.0 | Mozilla Thunderbird (en-US) 78.10.0 | Apr 15, 2021 |
| Linux | |||
| thunderbird · RHEL 8 | 0:78.9.1-1.el8_3 | RHSA-2021:1193 | Apr 14, 2021 |
| thunderbird · Ubuntu 18.04.6 LTS (bionic) | 1:78.11.0+build1-0ubuntu0.18.04.2 | thunderbird 1:78.11.0+build1-0ubuntu0.18.04.2 | Jun 1, 2021 |
| thunderbird · Ubuntu 20.04 LTS (focal) | 1:78.11.0+build1-0ubuntu0.20.04.2 | thunderbird 1:78.11.0+build1-0ubuntu0.20.04.2 | Jun 1, 2021 |
| thunderbird-gnome-support · Ubuntu 18.04.6 LTS (bionic) | 1:78.11.0+build1-0ubuntu0.18.04.2 | thunderbird-gnome-support 1:78.11.0+build1-0ubuntu0.18.04.2 | Jun 1, 2021 |
| thunderbird-gnome-support · Ubuntu 20.04 LTS (focal) | 1:78.11.0+build1-0ubuntu0.20.04.2 | thunderbird-gnome-support 1:78.11.0+build1-0ubuntu0.20.04.2 | Jun 1, 2021 |
| thunderbird-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 1:78.11.0+build1-0ubuntu0.18.04.2 | thunderbird-mozsymbols 1:78.11.0+build1-0ubuntu0.18.04.2 | Jun 1, 2021 |
| thunderbird-mozsymbols · Ubuntu 20.04 LTS (focal) | 1:78.11.0+build1-0ubuntu0.20.04.2 | thunderbird-mozsymbols 1:78.11.0+build1-0ubuntu0.20.04.2 | Jun 1, 2021 |
| xul-ext-calendar-timezones · Ubuntu 18.04.6 LTS (bionic) | 1:78.11.0+build1-0ubuntu0.18.04.2 | xul-ext-calendar-timezones 1:78.11.0+build1-0ubuntu0.18.04.2 | Jun 1, 2021 |
| xul-ext-calendar-timezones · Ubuntu 20.04 LTS (focal) | 1:78.11.0+build1-0ubuntu0.20.04.2 | xul-ext-calendar-timezones 1:78.11.0+build1-0ubuntu0.20.04.2 | Jun 1, 2021 |
| xul-ext-gdata-provider · Ubuntu 18.04.6 LTS (bionic) | 1:78.11.0+build1-0ubuntu0.18.04.2 | xul-ext-gdata-provider 1:78.11.0+build1-0ubuntu0.18.04.2 | Jun 1, 2021 |
| xul-ext-gdata-provider · Ubuntu 20.04 LTS (focal) | 1:78.11.0+build1-0ubuntu0.20.04.2 | xul-ext-gdata-provider 1:78.11.0+build1-0ubuntu0.20.04.2 | Jun 1, 2021 |
| xul-ext-lightning · Ubuntu 18.04.6 LTS (bionic) | 1:78.11.0+build1-0ubuntu0.18.04.2 | xul-ext-lightning 1:78.11.0+build1-0ubuntu0.18.04.2 | Jun 1, 2021 |
| xul-ext-lightning · Ubuntu 20.04 LTS (focal) | 1:78.11.0+build1-0ubuntu0.20.04.2 | xul-ext-lightning 1:78.11.0+build1-0ubuntu0.20.04.2 | Jun 1, 2021 |
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