| Name | CVE-2020-12420 |
| Description | When trying to connect to a STUN server, a race condition could have caused a use-after-free of a pointer, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-4713-1, DSA-4718-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| firefox (PTS) | sid | 133.0.3-1 | fixed |
| firefox-esr (PTS) | 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) | 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) | 78.0-1 | |||
| firefox-esr | source | stretch | 68.10.0esr-1~deb9u1 | DSA-4713-1 | ||
| firefox-esr | source | buster | 68.10.0esr-1~deb10u1 | DSA-4713-1 | ||
| firefox-esr | source | (unstable) | 68.10.0esr-1 | |||
| thunderbird | source | stretch | 1:68.10.0-1~deb9u1 | DSA-4718-1 | ||
| thunderbird | source | buster | 1:68.10.0-1~deb10u1 | DSA-4718-1 | ||
| thunderbird | source | (unstable) | 1:68.10.0-1 |
https://www.mozilla.org/en-US/security/advisories/mfsa2020-24/#CVE-2020-12420
https://www.mozilla.org/en-US/security/advisories/mfsa2020-25/#CVE-2020-12420
https://www.mozilla.org/en-US/security/advisories/mfsa2020-26/#CVE-2020-12420