CVE-2020-12398

If Thunderbird is configured to use STARTTLS for an IMAP server, and the server sends a PREAUTH response, then Thunderbird will continue with an unencrypted connection, causing email data to be sent without protection. This vulnerability affects Thunderbird < 68.9.0.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
mozillaCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 47%
VendorProductVersion
mozillathunderbird
𝑥
< 68.9.0
canonicalubuntu_linux
16.04
canonicalubuntu_linux
18.04
canonicalubuntu_linux
19.10
canonicalubuntu_linux
20.04
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)
1:128.4.0esr-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
focal
Fixed 1:68.10.0+build1-0ubuntu0.20.04.1
released
eoan
Fixed 1:68.10.0+build1-0ubuntu0.19.10.1
released
bionic
Fixed 1:68.10.0+build1-0ubuntu0.18.04.1
released
xenial
Fixed 1:68.10.0+build1-0ubuntu0.16.04.1
released
trusty
dne
Common Weakness Enumeration
References
https://bugzilla.mozilla.org/show_bug.cgi?id=1613623
https://usn.ubuntu.com/4421-1/
https://www.mozilla.org/security/advisories/mfsa2020-22/
https://bugzilla.mozilla.org/show_bug.cgi?id=1613623
https://usn.ubuntu.com/4421-1/
https://www.mozilla.org/security/advisories/mfsa2020-22/