CVE-2020-28896

NameCVE-2020-28896
DescriptionMutt before 2.0.2 and NeoMutt before 2020-11-20 did not ensure that $ssl_force_tls was processed if an IMAP server's initial server response was invalid. The connection was not properly closed, and the code could continue attempting to authenticate. This could result in authentication credentials being exposed on an unencrypted connection, or to a machine-in-the-middle.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2472-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
mutt (PTS)buster1.10.1-2.1+deb10u6fixed
buster (security)1.10.1-2.1+deb10u5fixed
bullseye2.0.5-4.1+deb11u1fixed
bookworm, sid2.2.9-1fixed
neomutt (PTS)buster20180716+dfsg.1-1+deb10u2fixed
buster (security)20180716+dfsg.1-1+deb10u1vulnerable
bullseye20201127+dfsg.1-1.2fixed
bookworm, sid20220429+dfsg1-4fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
muttsourcestretch1.7.2-1+deb9u4DLA-2472-1
muttsourcebuster1.10.1-2.1+deb10u4
muttsource(unstable)2.0.2-1
neomuttsourcebuster20180716+dfsg.1-1+deb10u2
neomuttsource(unstable)20201120+dfsg.1-1

Notes

https://gitlab.com/muttmua/mutt/-/commit/04b06aaa3e0cc0022b9b01dbca2863756ebbf59a
https://github.com/neomutt/neomutt/commit/9c36717a3e2af1f2c1b7242035455ec8112b4b06

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