ArchLinux: 202101-43: mutt: denial of service
Summary
rfc822.c in Mutt through 2.0.4 allows remote attackers to cause a denial of service (mailbox unavailability) by sending email messages with sequences of semicolon characters in RFC822 address fields (aka terminators of empty groups). A small email message from the attacker can cause large memory consumption, and the victim may then be unable to see email messages from other persons.
Resolution
Upgrade to 2.0.5-1.
# pacman -Syu "mutt>=2.0.5-1"
The problem has been fixed upstream in version 2.0.5.
References
https://www.openwall.com/lists/oss-security/2021/01/17/2 https://gitlab.com/muttmua/mutt/-/issues/323 https://gitlab.com/muttmua/mutt/uploads/ecd287245a2d0ac0108797eab2f1a224/rfc822_parse_adrlist.txt https://gitlab.com/muttmua/mutt/-/commit/4a2becbdb4422aaffe3ce314991b9d670b7adf17 https://security.archlinux.org/CVE-2021-3181
Workaround
None.