#VU25339 Infinite loop in Dovecot - CVE-2020-7046
Published: February 13, 2020
Vulnerability identifier: #VU25339
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2020-7046
CWE-ID: CWE-835
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Dovecot
Dovecot
Software vendor:
Dovecot
Dovecot
Description
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.
Remediation
Install updates from vendor's website.