| Name | CVE-2020-6822 |
| Description | On 32-bit builds, an out of bounds write could have occurred when processing an image larger than 4 GB in <code>GMPDecodeData</code>. It is possible that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Thunderbird < 68.7.0, Firefox ESR < 68.7, and Firefox < 75. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-2170-1, DLA-2172-1, DSA-4655-1, DSA-4656-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| firefox (PTS) | sid | 138.0.1-1 | fixed |
| firefox-esr (PTS) | bullseye | 115.14.0esr-1~deb11u1 | fixed |
| bullseye (security) | 128.9.0esr-1~deb11u1 | fixed | |
| bookworm | 128.8.0esr-1~deb12u1 | fixed | |
| bookworm (security) | 128.10.0esr-1~deb12u1 | fixed | |
| sid, trixie | 128.10.0esr-1 | fixed | |
| thunderbird (PTS) | bullseye | 1:115.12.0-1~deb11u1 | fixed |
| bullseye (security) | 1:128.10.0esr-1~deb11u1 | fixed | |
| bookworm | 1:128.8.0esr-1~deb12u1 | fixed | |
| bookworm (security) | 1:128.10.0esr-1~deb12u1 | fixed | |
| sid, trixie | 1:128.10.0esr-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) | 75.0-1 | |||
| firefox-esr | source | jessie | 68.7.0esr-1~deb8u1 | DLA-2170-1 | ||
| firefox-esr | source | stretch | 68.7.0esr-1~deb9u1 | DSA-4655-1 | ||
| firefox-esr | source | buster | 68.7.0esr-1~deb10u1 | DSA-4655-1 | ||
| firefox-esr | source | (unstable) | 68.7.0esr-1 | |||
| thunderbird | source | jessie | 1:68.7.0-1~deb8u1 | DLA-2172-1 | ||
| thunderbird | source | stretch | 1:68.7.0-1~deb9u1 | DSA-4656-1 | ||
| thunderbird | source | buster | 1:68.7.0-1~deb10u1 | DSA-4656-1 | ||
| thunderbird | source | (unstable) | 1:68.7.0-1 |
https://www.mozilla.org/en-US/security/advisories/mfsa2020-14/#CVE-2020-6822
https://www.mozilla.org/en-US/security/advisories/mfsa2020-13/#CVE-2020-6822
https://www.mozilla.org/en-US/security/advisories/mfsa2020-12/#CVE-2020-6822