CVE-2021-43534

EUVD-2021-30463
Mozilla developers and community members reported memory safety bugs present in Firefox 93 and Firefox ESR 91.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
8.8 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 72%
Affected Products (NVD)
VendorProductVersion
mozillafirefox
𝑥
< 94.0
mozillafirefox_esr
𝑥
< 91.3.0
mozillathunderbird
𝑥
< 91.3.0
debiandebian_linux
9.0
debiandebian_linux
10.0
debiandebian_linux
11.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
firefox
sid
132.0.1-1
fixed
firefox-esr
bookworm
115.14.0esr-1~deb12u1
fixed
bookworm (security)
128.4.0esr-1~deb12u1
fixed
bullseye
115.14.0esr-1~deb11u1
fixed
bullseye (security)
128.4.0esr-1~deb11u1
fixed
sid
128.4.0esr-1
fixed
trixie
128.3.1esr-2
fixed
thunderbird
bookworm
1:115.12.0-1~deb12u1
fixed
bookworm (security)
1:115.16.0esr-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
firefox
bionic
not-affected
focal
not-affected
hirsute
not-affected
impish
not-affected
jammy
not-affected
kinetic
not-affected
lunar
not-affected
trusty
dne
xenial
ignored
thunderbird
bionic
Fixed 1:91.5.0+build1-0ubuntu0.18.04.1
released
focal
Fixed 1:91.5.0+build1-0ubuntu0.20.04.1
released
hirsute
ignored
impish
not-affected
jammy
not-affected
kinetic
not-affected
lunar
not-affected
trusty
dne
xenial
ignored