SB2020112603 - MitM attack in Mutt
Published: November 26, 2020
Security Bulletin ID
SB2020112603
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
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.
Remediation
Install update from vendor's website.
References
- https://github.com/neomutt/neomutt/commit/9c36717a3e2af1f2c1b7242035455ec8112b4b06
- https://github.com/neomutt/neomutt/releases/tag/20201120
- https://gitlab.com/muttmua/mutt/-/commit/04b06aaa3e0cc0022b9b01dbca2863756ebbf59a
- https://gitlab.com/muttmua/mutt/-/commit/d92689088dfe80a290ec836e292376e2d9984f8f