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Vulnerability · Published Jan 19, 2021 · Assigned by mitre

CVE-2021-3181

Medium 6.5

In plain English

A medium-severity security flaw in the mutt package (AlmaLinux). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.8% (higher than 87% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)2.8%top 13.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official 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 & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8mutt5:2.0.7-1.el8ALSA-2021:4181
Alpine:v3.20mutt2.0.4-r1ALPINE-CVE-2021-3181
Alpine:v3.21mutt2.0.4-r1ALPINE-CVE-2021-3181
Alpine:v3.22mutt2.0.4-r1ALPINE-CVE-2021-3181
Alpine:v3.23mutt2.0.4-r1ALPINE-CVE-2021-3181
Alpine:v3.24mutt2.0.4-r1ALPINE-CVE-2021-3181
Debian:12mutt2.0.5-1DEBIAN-CVE-2021-3181
Debian:13mutt2.0.5-1DEBIAN-CVE-2021-3181
Debian:14mutt2.0.5-1DEBIAN-CVE-2021-3181
Rocky Linux:8mutt5:2.0.7-1.el8RLSA-2021:4181

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References