Debian Jessie: DLA-2268-2 Critical: Mutt Man-In-The-Middle Attack

CVE-2020-14093

Mutt allowed an IMAP fcc/postpone man-in-the-middle attack via a
PREAUTH response.

CVE-2020-14954

Mutt had a STARTTLS buffering issue that affected IMAP, SMTP, and
POP3. When a server had sent a "begin TLS" response, the client read
additional data (e.g., from a man-in-the-middle attacker) and
evaluated it in a TLS context, aka "response injection."

In Debian jessie, the mutt source package builds two variants of mutt:
mutt and mutt-patched.

The previous package version (1.5.23-3+deb8u2, DLA-2268-1) provided fixes
for the issues referenced above, but they were only applied for the
mutt-patched package build, not for the (vanilla) mutt package build.

For Debian 8 "Jessie", this problem has been fixed in version
1.5.23-3+deb8u3.

We recommend that you upgrade your mutt packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS

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