SB2017041168 - Fedora 24 update for dovecot
Published: April 11, 2017 Updated: April 24, 2025
Security Bulletin ID
SB2017041168
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Resource exhaustion (CVE-ID: CVE-2017-2669)
The vulnerability allows a remote attacker to perform denial of service (DoS)M attack.
The vulnerability exists due to the username sent by the IMAP/POP3 client was sent through var_expand() to perform %variable expansion when 'dict' passdb and userdb were used for user authentication. A remote attacker can send specially crafted %variable fields, use excessive memory and cause the process to crash.
Remediation
Install update from vendor's website.