| Name | CVE-2020-6819 |
| Description | Under certain conditions, when running the nsDocShell destructor, a race condition can cause a use-after-free. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Thunderbird < 68.7.0, Firefox < 74.0.1, and Firefox ESR < 68.6.1. |
| 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-4653-1, DSA-4656-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| firefox (PTS) | sid | 133.0.3-1 | fixed |
| firefox-esr (PTS) | jessie, jessie (lts) | 68.9.0esr-1~deb8u2 | fixed |
| stretch (security), stretch (lts), stretch | 91.11.0esr-1~deb9u1 | fixed | |
| buster (security), buster, buster (lts) | 115.12.0esr-1~deb10u1 | fixed | |
| bullseye | 115.14.0esr-1~deb11u1 | fixed | |
| bullseye (security) | 128.5.0esr-1~deb11u1 | fixed | |
| bookworm | 128.3.1esr-1~deb12u1 | fixed | |
| bookworm (security) | 128.5.0esr-1~deb12u1 | fixed | |
| trixie | 128.5.0esr-1 | fixed | |
| sid | 128.5.1esr-1 | fixed | |
| thunderbird (PTS) | jessie, jessie (lts) | 1:68.9.0-1~deb8u2 | fixed |
| stretch (security), stretch (lts), stretch | 1:91.10.0-1~deb9u1 | fixed | |
| buster (security), buster, buster (lts) | 1:115.12.0-1~deb10u1 | fixed | |
| bullseye | 1:115.12.0-1~deb11u1 | fixed | |
| bullseye (security) | 1:128.5.0esr-1~deb11u1 | fixed | |
| bookworm | 1:115.16.0esr-1~deb12u1 | fixed | |
| bookworm (security) | 1:128.5.0esr-1~deb12u1 | fixed | |
| sid, trixie | 1:128.5.2esr-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) | 74.0.1-1 | |||
| firefox-esr | source | jessie | 68.7.0esr-1~deb8u1 | DLA-2170-1 | ||
| firefox-esr | source | stretch | 68.6.1esr-1~deb9u1 | DSA-4653-1 | ||
| firefox-esr | source | buster | 68.6.1esr-1~deb10u1 | DSA-4653-1 | ||
| firefox-esr | source | (unstable) | 68.6.1esr-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/mfsa2020-11/#CVE-2020-6819
https://www.mozilla.org/en-US/security/advisories/mfsa2020-14/#CVE-2020-6819