Two vulnerabilities have been discovered in mutt, a console email client.
Mutt allowed an IMAP fcc/postpone man-in-the-middle attack via a
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
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
mike gabriel aka sunweaver (Debian Developer)
fon: +49 (1520) 1976 148
GnuPG Fingerprint: 9BFB AEE8 6C0A A5FF BF22 0782 9AF4 6B30 2577 1B31
mail: email@example.com, https://sunweavers.net