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Published: 19 January 2021

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.



CVSS 3 base score: 6.5


Package Release Status
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 20.04 LTS (Focal Fossa)
Released (1.13.2-1ubuntu0.4)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (1.9.4-3ubuntu0.5)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (1.5.24-1ubuntu0.6)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist