CVE-2021-23993
thunderbirdVulnerabilityCVSS 6.5Patched
No public exploitation has been reported so far. A fixed version is available (see the table below).
Recommended action: Update to the fixed version listed for your distribution using the native package manager.
Severity metrics
CVSS 3.1 : 6.5 MEDIUM · CVSS 2.0 : 4.3 MEDIUM
Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
Confidentiality impactNone
Integrity impactHigh
Availability impactNone
Vector: AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Affected & fixed versions by distribution
Versions are the native distribution strings (backport-aware): RHEL/Debian/SUSE backport fixes, so compare with the distro version comparator (dpkg / rpm / vercmp), not the upstream version.
| Distribution | Package | Affected | Fixed version | Status |
|---|---|---|---|---|
| Arch | thunderbird | 78.9.0-1 | 78.9.1-1 | fixed |
| Debian:11 | thunderbird | - | 1:78.10.0-1 | fixed |
| Debian:12 | thunderbird | - | 1:78.10.0-1 | fixed |
| Debian:13 | thunderbird | - | 1:78.10.0-1 | fixed |
| Debian:14 | thunderbird | - | 1:78.10.0-1 | fixed |
| Debian:9 | thunderbird | - | 1:78.10.0-1~deb9u1 | fixed |
| Debian:10 | thunderbird | - | 1:78.10.0-1~deb10u1 | fixed |
| Ubuntu:18.04:LTS | thunderbird | - | 1:78.11.0+build1-0ubuntu0.18.04.2 | fixed |
| Ubuntu:20.04:LTS | thunderbird | - | 1:78.11.0+build1-0ubuntu0.20.04.2 | fixed |
| openSUSE:Leap 15.2 | MozillaThunderbird | - | 78.9.1-lp152.2.38.1 | fixed |
| openSUSE:Tumbleweed | MozillaThunderbird | - | 91.1.1-1.1 | fixed |
| Red Hat:rhel_eus:8.1::appstream | thunderbird | - | 0:78.9.1-1.el8_1 | fixed |
| Red Hat:enterprise_linux:7::client | thunderbird | - | 0:78.9.1-1.el7_9 | fixed |
| Red Hat:enterprise_linux:7::server | thunderbird | - | 0:78.9.1-1.el7_9 | fixed |
| Red Hat:enterprise_linux:7::workstation | thunderbird | - | 0:78.9.1-1.el7_9 | fixed |
| Red Hat:enterprise_linux:8::appstream | thunderbird | - | 0:78.9.1-1.el8_3 | fixed |
| Red Hat:rhel_eus:8.2::appstream | thunderbird | - | 0:78.9.1-1.el8_2 | fixed |