SB2020072819 - Gentoo update for Mutt, Neomutt

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Man-in-the-Middle (MitM) attack (CVE-ID: CVE-2020-14093)

The vulnerability allows a remote attacker to perform a Man-in-the-Middle (MitM) attack.

The vulnerability exists within the IMAP fcc/postpone when processing PREAUTH responses. A remote attacker with ability to intercept traffic can perform a Man-in-the-Middle (MitM) attack.

2) Improper Certificate Validation (CVE-ID: CVE-2020-14154)

The vulnerability allows a remote attacker to perform a man-in-the-Middle (MitM) attack.

The vulnerability exists due to improper certificate validation in mutt. The application proceeds with the connection eve if in response to a GnuTLS certificate prompt the user rejects an expired intermediate certificate.

3) Code injection (CVE-ID: CVE-2020-14954)

The vulnerability allows a remote attacker to perform a spoofing attack.

The vulnerability exists due to insecure implementation of the STARTTLS buffering for IMAP, SMTP, and POP3 protocols. A remote attacker can inject arbitrary data into the TLS context during MitM attack, e.g. perform a response injection attack.

Remediation

Install update from vendor's website.

References

• https://security.gentoo.org/
• https://security.gentoo.org/glsa/202007-57