Name | CVE-2020-6820 |
Description | Under certain conditions, when handling a ReadableStream, 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 | 132.0-1 | fixed |
firefox-esr (PTS) | bullseye | 115.14.0esr-1~deb11u1 | fixed |
bullseye (security) | 128.4.0esr-1~deb11u1 | fixed | |
bookworm | 115.14.0esr-1~deb12u1 | fixed | |
bookworm (security) | 128.4.0esr-1~deb12u1 | fixed | |
trixie | 128.3.1esr-2 | fixed | |
sid | 128.4.0esr-1 | fixed | |
thunderbird (PTS) | bullseye | 1:115.12.0-1~deb11u1 | fixed |
bullseye (security) | 1:128.4.0esr-1~deb11u1 | fixed | |
bookworm | 1:115.12.0-1~deb12u1 | fixed | |
bookworm (security) | 1:115.16.0esr-1~deb12u1 | fixed | |
trixie | 1:128.3.2esr-1 | fixed | |
sid | 1:128.4.0esr-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) | 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-2020-6820
https://www.mozilla.org/en-US/security/advisories/mfsa2020-14/#CVE-2020-6820