CVE-2021-3181
MEDIUM6.5EPSS 2.8%mutt - security update
Published: 1/19/2021Modified: 4/28/2026
Description
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.
Affected packages (3)
- Debian/muttfrom 0, < 2.0.5-1
- Debian/muttfrom 0, < 1.7.2-1+deb9u5
- Debian/muttfrom 0, < 1.10.1-2.1+deb10u5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |