CVE-2020-26970

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.
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: 59%
Affected Products (NVD)
VendorProductVersion
mozillathunderbird
𝑥
< 78.5.1
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
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
thunderbird
bionic
Fixed 1:78.8.1+build1-0ubuntu0.18.04.1
released
focal
Fixed 1:78.7.1+build1-0ubuntu0.20.04.1
released
groovy
Fixed 1:78.6.1+build1-0ubuntu0.20.10.1
released
hirsute
Fixed 1:78.5.1+build1-0ubuntu1
released
impish
Fixed 1:78.5.1+build1-0ubuntu1
released
jammy
Fixed 1:78.5.1+build1-0ubuntu1
released
kinetic
Fixed 1:78.5.1+build1-0ubuntu1
released
lunar
Fixed 1:78.5.1+build1-0ubuntu1
released
trusty
dne
xenial
ignored
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
MozillaThunderbird
suse enterprise desktop 15 SP1
78.5.1-3.110.2
fixed
suse enterprise desktop 15 SP2
78.6.0-8.3.1
fixed
suse enterprise desktop 15 SP3
78.6.0-8.3.1
fixed
suse enterprise desktop 15 SP4
78.6.0-8.3.1
fixed
suse enterprise desktop 15 SP5
78.6.0-8.3.1
fixed
suse enterprise desktop 15 SP6
78.6.0-8.3.1
fixed
suse enterprise desktop 15 SP7
78.6.0-8.3.1
fixed
suse enterprise sap 15 SP1
78.5.1-3.110.2
fixed
suse enterprise sap 15 SP2
78.6.0-8.3.1
fixed
suse enterprise sap 15 SP3
78.6.0-8.3.1
fixed
suse enterprise sap 15 SP4
78.6.0-8.3.1
fixed
suse enterprise sap 15 SP5
78.6.0-8.3.1
fixed
suse enterprise sap 15 SP6
78.6.0-8.3.1
fixed
suse enterprise sap 15 SP7
78.6.0-8.3.1
fixed
suse enterprise server 15 SP1
78.5.1-3.110.2
fixed
suse enterprise server 15 SP2
78.6.0-8.3.1
fixed
suse enterprise server 15 SP3
78.6.0-8.3.1
fixed
suse enterprise server 15 SP4
78.6.0-8.3.1
fixed
suse enterprise server 15 SP5
78.6.0-8.3.1
fixed
suse enterprise server 15 SP6
78.6.0-8.3.1
fixed
suse enterprise server 15 SP7
78.6.0-8.3.1
fixed
suse enterprise workstation 15 SP1
78.5.1-3.110.2
fixed
suse enterprise workstation 15 SP2
78.6.0-8.3.1
fixed
suse enterprise workstation 15 SP3
78.6.0-8.3.1
fixed
suse enterprise workstation 15 SP4
78.6.0-8.3.1
fixed
suse enterprise workstation 15 SP5
78.6.0-8.3.1
fixed
suse enterprise workstation 15 SP6
78.6.0-8.3.1
fixed
suse enterprise workstation 15 SP7
78.6.0-8.3.1
fixed
MozillaThunderbird-translations-common
suse enterprise desktop 15 SP1
78.5.1-3.110.2
fixed
suse enterprise desktop 15 SP2
78.6.0-8.3.1
fixed
suse enterprise desktop 15 SP3
78.6.0-8.3.1
fixed
suse enterprise desktop 15 SP4
78.6.0-8.3.1
fixed
suse enterprise desktop 15 SP5
78.6.0-8.3.1
fixed
suse enterprise desktop 15 SP6
78.6.0-8.3.1
fixed
suse enterprise desktop 15 SP7
78.6.0-8.3.1
fixed
suse enterprise sap 15 SP1
78.5.1-3.110.2
fixed
suse enterprise sap 15 SP2
78.6.0-8.3.1
fixed
suse enterprise sap 15 SP3
78.6.0-8.3.1
fixed
suse enterprise sap 15 SP4
78.6.0-8.3.1
fixed
suse enterprise sap 15 SP5
78.6.0-8.3.1
fixed
suse enterprise sap 15 SP6
78.6.0-8.3.1
fixed
suse enterprise sap 15 SP7
78.6.0-8.3.1
fixed
suse enterprise server 15 SP1
78.5.1-3.110.2
fixed
suse enterprise server 15 SP2
78.6.0-8.3.1
fixed
suse enterprise server 15 SP3
78.6.0-8.3.1
fixed
suse enterprise server 15 SP4
78.6.0-8.3.1
fixed
suse enterprise server 15 SP5
78.6.0-8.3.1
fixed
suse enterprise server 15 SP6
78.6.0-8.3.1
fixed
suse enterprise server 15 SP7
78.6.0-8.3.1
fixed
suse enterprise workstation 15 SP1
78.5.1-3.110.2
fixed
suse enterprise workstation 15 SP2
78.6.0-8.3.1
fixed
suse enterprise workstation 15 SP3
78.6.0-8.3.1
fixed
suse enterprise workstation 15 SP4
78.6.0-8.3.1
fixed
suse enterprise workstation 15 SP5
78.6.0-8.3.1
fixed
suse enterprise workstation 15 SP6
78.6.0-8.3.1
fixed
suse enterprise workstation 15 SP7
78.6.0-8.3.1
fixed
MozillaThunderbird-translations-other
suse enterprise desktop 15 SP1
78.5.1-3.110.2
fixed
suse enterprise desktop 15 SP2
78.6.0-8.3.1
fixed
suse enterprise desktop 15 SP3
78.6.0-8.3.1
fixed
suse enterprise desktop 15 SP4
78.6.0-8.3.1
fixed
suse enterprise desktop 15 SP5
78.6.0-8.3.1
fixed
suse enterprise desktop 15 SP6
78.6.0-8.3.1
fixed
suse enterprise desktop 15 SP7
78.6.0-8.3.1
fixed
suse enterprise sap 15 SP1
78.5.1-3.110.2
fixed
suse enterprise sap 15 SP2
78.6.0-8.3.1
fixed
suse enterprise sap 15 SP3
78.6.0-8.3.1
fixed
suse enterprise sap 15 SP4
78.6.0-8.3.1
fixed
suse enterprise sap 15 SP5
78.6.0-8.3.1
fixed
suse enterprise sap 15 SP6
78.6.0-8.3.1
fixed
suse enterprise sap 15 SP7
78.6.0-8.3.1
fixed
suse enterprise server 15 SP1
78.5.1-3.110.2
fixed
suse enterprise server 15 SP2
78.6.0-8.3.1
fixed
suse enterprise server 15 SP3
78.6.0-8.3.1
fixed
suse enterprise server 15 SP4
78.6.0-8.3.1
fixed
suse enterprise server 15 SP5
78.6.0-8.3.1
fixed
suse enterprise server 15 SP6
78.6.0-8.3.1
fixed
suse enterprise server 15 SP7
78.6.0-8.3.1
fixed
suse enterprise workstation 15 SP1
78.5.1-3.110.2
fixed
suse enterprise workstation 15 SP2
78.6.0-8.3.1
fixed
suse enterprise workstation 15 SP3
78.6.0-8.3.1
fixed
suse enterprise workstation 15 SP4
78.6.0-8.3.1
fixed
suse enterprise workstation 15 SP5
78.6.0-8.3.1
fixed
suse enterprise workstation 15 SP6
78.6.0-8.3.1
fixed
suse enterprise workstation 15 SP7
78.6.0-8.3.1
fixed
Red Hat logo
Red Hat Enterprise Linux Releases
Red Hat Product
Release
thunderbird
RHEL 7
0:78.5.1-1.el7_9
fixed
Common Weakness Enumeration
References
https://bugzilla.mozilla.org/show_bug.cgi?id=1677338
https://www.mozilla.org/security/advisories/mfsa2020-53/
https://bugzilla.mozilla.org/show_bug.cgi?id=1677338
https://www.mozilla.org/security/advisories/mfsa2020-53/