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
NISTNIST
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
mozillaCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 58%
VendorProductVersion
mozillathunderbird
𝑥
< 78.5.1
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
thunderbird
bullseye
1:115.12.0-1~deb11u1
fixed
bullseye (security)
1:128.4.0esr-1~deb11u1
fixed
bookworm
1:115.12.0-1~deb12u1
fixed
bookworm (security)
1:115.16.0esr-1~deb12u1
fixed
sid
1:128.4.0esr-1
fixed
trixie
1:128.4.0esr-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
thunderbird
lunar
Fixed 1:78.5.1+build1-0ubuntu1
released
kinetic
Fixed 1:78.5.1+build1-0ubuntu1
released
jammy
Fixed 1:78.5.1+build1-0ubuntu1
released
impish
Fixed 1:78.5.1+build1-0ubuntu1
released
hirsute
Fixed 1:78.5.1+build1-0ubuntu1
released
groovy
Fixed 1:78.6.1+build1-0ubuntu0.20.10.1
released
focal
Fixed 1:78.7.1+build1-0ubuntu0.20.04.1
released
bionic
Fixed 1:78.8.1+build1-0ubuntu0.18.04.1
released
xenial
ignored
trusty
dne
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/