Mutt, NeoMutt: Denial of service — GLSA 202105-05

A vulnerability in Mutt and NeoMutt could lead to a Denial of Service condition.

Affected packages

mail-client/mutt on all architectures
Affected versions < 2.0.7
Unaffected versions >= 2.0.7
mail-client/neomutt on all architectures
Affected versions < 20210205-r1
Unaffected versions >= 20210205-r1

Background

Mutt is a small but very powerful text-based mail client.

NeoMutt is a command line mail reader (or MUA). It’s a fork of Mutt with added features.

Description

It was discovered that Mutt, and NeoMutt did not properly handle certain situations where an IMAP sequence set ends with a comma.

Impact

A remote attacker could entice a user to connect to a malicious IMAP server to cause a Denial of Service condition, or other unspecified impacts.

Workaround

There is no known workaround at this time.

Resolution

All Mutt users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=mail-client/mutt-2.0.7"
 

All NeoMutt users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=mail-client/neomutt-20210205-r1"
 

References

Release date
May 26, 2021

Latest revision
May 26, 2021: 1

Severity
low

Exploitable
remote

Bugzilla entries