Rapid7 Vulnerability & Exploit Database

Ubuntu: (Multiple Advisories) (CVE-2017-2669): Dovecot regression

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Ubuntu: (Multiple Advisories) (CVE-2017-2669): Dovecot regression

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Published
04/10/2017
Created
07/25/2018
Added
04/11/2017
Modified
03/02/2020

Description

Dovecot before version 2.2.29 is vulnerable to a denial of service. When 'dict' passdb and userdb were used for user authentication, the username sent by the IMAP/POP3 client was sent through var_expand() to perform %variable expansion. Sending specially crafted %variable fields could result in excessive memory usage causing the process to crash (and restart), or excessive CPU usage causing all authentications to hang.

Solution(s)

  • ubuntu-upgrade-dovecot-core

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