CVE-2021-3181: Medium severity Mutt Mutt vulnerability
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 Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/muttto a version that resolves this vulnerability.Fixed in 1.10.1-2.1+deb10u6Fixed in 1.10.1-2.1+deb10u7Fixed in 2.0.5-4.1+deb11u3Fixed in 2.2.12-0.1~deb12u1Fixed in 2.2.9-1+deb12u1Fixed in 2.2.12-0.1 - Upgrade
Upgrade
debian/muttto a version that resolves this vulnerability.Fixed in 2.0.5-1Fixed in 1.10.1-2.1+deb10u5
Event History
Frequently Asked Questions
What is the vulnerability ID of this issue?
The vulnerability ID is CVE-2021-3181.
What is the severity of CVE-2021-3181?
The severity of CVE-2021-3181 is high.
How does CVE-2021-3181 impact Mutt?
CVE-2021-3181 allows remote attackers to cause a denial of service (mailbox unavailability) in Mutt.
Which versions of Mutt are affected by CVE-2021-3181?
Mutt versions up to and including 2.0.4 are affected by CVE-2021-3181.
How can I fix CVE-2021-3181?
To fix CVE-2021-3181, update Mutt to version 2.0.5-1 or apply the recommended patches from the vendor.