CVE-2021-23991

EUVD-2021-10911
If a Thunderbird user has previously imported Alice's OpenPGP key, and Alice has extended the validity period of her key, but Alice's updated key has not yet been imported, an attacker may send an email containing a crafted version of Alice's key with an invalid subkey, Thunderbird might subsequently attempt to use the invalid subkey, and will fail to send encrypted email to Alice. This vulnerability affects Thunderbird < 78.9.1.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.8 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 42%
Affected Products (NVD)
VendorProductVersion
mozillathunderbird
𝑥
< 78.9.1
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
thunderbird
bookworm
1:115.12.0-1~deb12u1
fixed
bookworm (security)
1:128.4.0esr-1~deb12u1
fixed
bullseye
1:115.12.0-1~deb11u1
fixed
bullseye (security)
1:128.4.0esr-1~deb11u1
fixed
sid
1:128.4.0esr-1
fixed
trixie
1:128.4.0esr-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
thunderbird
bionic
Fixed 1:78.11.0+build1-0ubuntu0.18.04.2
released
focal
Fixed 1:78.11.0+build1-0ubuntu0.20.04.2
released
groovy
Fixed 1:78.11.0+build1-0ubuntu0.20.10.2
released
hirsute
Fixed 1:78.11.0+build1-0ubuntu0.21.04.2
released
impish
Fixed 1:78.11.0+build1-0ubuntu2
released
jammy
Fixed 1:78.11.0+build1-0ubuntu2
released
kinetic
Fixed 1:78.11.0+build1-0ubuntu2
released
lunar
Fixed 1:78.11.0+build1-0ubuntu2
released
trusty
dne
xenial
ignored
References
https://bugzilla.mozilla.org/show_bug.cgi?id=1673240
https://www.mozilla.org/security/advisories/mfsa2021-13/
https://bugzilla.mozilla.org/show_bug.cgi?id=1673240
https://www.mozilla.org/security/advisories/mfsa2021-13/