| Name | CVE-2020-26970 |
| Description | When reading SMTP server status codes, Thunderbird writes an integer value to a position on the stack that is intended to contain just one byte. Depending on processor architecture and stack layout, this leads to stack corruption that may be exploitable. This vulnerability affects Thunderbird < 78.5.1. |
| 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-2479-1, DSA-4802-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| thunderbird (PTS) | jessie, jessie (lts) | 1:68.9.0-1~deb8u2 | vulnerable |
| stretch (security), stretch (lts), stretch | 1:91.10.0-1~deb9u1 | fixed | |
| buster | 1:91.12.0-1~deb10u1 | fixed | |
| buster (security) | 1:115.10.1-1~deb10u1 | fixed | |
| bullseye | 1:115.7.0-1~deb11u1 | fixed | |
| bullseye (security) | 1:115.10.1-1~deb11u1 | fixed | |
| bookworm | 1:115.7.0-1~deb12u1 | fixed | |
| bookworm (security) | 1:115.10.1-1~deb12u1 | fixed | |
| sid, trixie | 1:115.10.1-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| thunderbird | source | jessie | (unfixed) | end-of-life | ||
| thunderbird | source | stretch | 1:78.5.1-1~deb9u1 | DLA-2479-1 | ||
| thunderbird | source | buster | 1:78.5.1-1~deb10u1 | DSA-4802-1 | ||
| thunderbird | source | (unstable) | 1:78.5.1-1 |
https://www.mozilla.org/en-US/security/advisories/mfsa2020-53/#CVE-2020-26970