SB2020021238 - Fedora 31 update for dovecot

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Main Vulnerability Database SB2020021238

SB2020021238 - Fedora 31 update for dovecot

Published: February 12, 2020 Updated: April 25, 2025

Security Bulletin ID SB2020021238
Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

High 50% Medium 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Infinite loop (CVE-ID: CVE-2020-7046)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop in lib-smtp in submission-login and lmtp and processing truncated UTF-8 data in command parameters. A remote non-authenticated attacker can send specially crafted command to the dovecot server and consume all available system resources and perform a denial of service attack.


2) Input validation error (CVE-ID: CVE-2020-7957)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input within the IMAP and LMTP components when many characters must be read while computing the snippet and a trailing ">" character is present. As a result the recipient cannot read all messages in the mailbox.


Remediation

Install update from vendor's website.

References