| Name | CVE-2021-29964 |
| Description | A locally-installed hostile program could send `WM_COPYDATA` messages that Firefox would process incorrectly, leading to an out-of-bounds read. *This bug only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability affects Thunderbird < 78.11, Firefox < 89, and Firefox ESR < 78.11. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| firefox (PTS) | sid | 125.0.2-1 | fixed |
| firefox-esr (PTS) | buster | 91.12.0esr-1~deb10u1 | fixed |
| buster (security) | 115.10.0esr-1~deb10u1 | fixed |
| bullseye | 115.7.0esr-1~deb11u1 | fixed |
| bullseye (security) | 115.10.0esr-1~deb11u1 | fixed |
| bookworm | 115.7.0esr-1~deb12u1 | fixed |
| bookworm (security) | 115.10.0esr-1~deb12u1 | fixed |
| trixie | 115.8.0esr-1 | fixed |
| sid | 115.10.0esr-1 | fixed |
| thunderbird (PTS) | buster | 1:91.12.0-1~deb10u1 | fixed |
| buster (security) | 1:115.10.1-1~deb10u1 | fixed |
| bullseye | 1:115.7.0-1~deb11u1 | fixed |
| bullseye (security) | 1:115.10.1-1~deb11u1 | fixed |
| bookworm | 1:115.7.0-1~deb12u1 | fixed |
| bookworm (security) | 1:115.10.1-1~deb12u1 | fixed |
| sid | 1:115.10.1-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| firefox | source | (unstable) | (not affected) | | | |
| firefox-esr | source | (unstable) | (not affected) | | | |
| thunderbird | source | (unstable) | (not affected) | | | |
Notes
- firefox-esr <not-affected> (Only affects Windows)
- firefox <not-affected> (Only affects Windows)
- thunderbird <not-affected> (Only affects Windows)
https://www.mozilla.org/en-US/security/advisories/mfsa2021-26/#CVE-2021-29964
https://www.mozilla.org/en-US/security/advisories/mfsa2021-24/#CVE-2021-29964
https://www.mozilla.org/en-US/security/advisories/mfsa2021-23/#CVE-2021-29964