Name | CVE-2020-26950 |
Description | In certain circumstances, the MCallGetProperty opcode can be emitted with unmet assumptions resulting in an exploitable use-after-free condition. This vulnerability affects Firefox < 82.0.3, Firefox ESR < 78.4.1, and Thunderbird < 78.4.2. |
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-2448-1, DLA-2449-1, DSA-4788-1, DSA-4790-1 |
The table below lists information on source packages.
Source Package | Release | Version | Status |
---|---|---|---|
firefox (PTS) | sid | 131.0.2-2 | fixed |
firefox-esr (PTS) | bullseye | 115.14.0esr-1~deb11u1 | fixed |
bullseye (security) | 128.3.1esr-1~deb11u1 | fixed | |
bookworm | 115.14.0esr-1~deb12u1 | fixed | |
bookworm (security) | 128.3.1esr-1~deb12u1 | fixed | |
trixie | 128.3.0esr-2 | fixed | |
sid | 128.3.1esr-2 | fixed | |
thunderbird (PTS) | bullseye | 1:115.12.0-1~deb11u1 | fixed |
bullseye (security) | 1:115.16.0esr-1~deb11u1 | fixed | |
bookworm | 1:115.12.0-1~deb12u1 | fixed | |
bookworm (security) | 1:115.16.0esr-1~deb12u1 | fixed | |
trixie | 1:128.2.0esr-1 | fixed | |
sid | 1:128.3.0esr-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) | 82.0.3-1 | |||
firefox-esr | source | stretch | 78.4.1esr-1~deb9u1 | DLA-2448-1 | ||
firefox-esr | source | buster | 78.4.1esr-1~deb10u1 | DSA-4788-1 | ||
firefox-esr | source | (unstable) | 78.4.1esr-1 | |||
thunderbird | source | stretch | 1:78.4.2-1~deb9u1 | DLA-2449-1 | ||
thunderbird | source | buster | 1:78.4.2-1~deb10u1 | DSA-4790-1 | ||
thunderbird | source | (unstable) | 1:78.4.2-1 |
https://www.mozilla.org/en-US/security/advisories/mfsa2020-49/#CVE-2020-26950