SB2021111026 - Red Hat Enterprise Linux 8 update for mutt
Published: November 10, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) Cleartext transmission of sensitive information (CVE-ID: CVE-2020-28896)
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to software does not ensure that $ssl_force_tls is processed if an IMAP server's initial
server response is invalid. As a result, the connection is not properly closed, and
the application continues authentication attempts. A remote attacker with ability to intercept traffic can perform a MitM attack and gain access to victim's credentials.
2) Resource exhaustion (CVE-ID: CVE-2021-3181)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation when handling email messages with sequences of semicolon characters in RFC822 address fields. A remote attacker can send a specially crafted email message, force the application to consume a huge amount of memory and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.