CVE ID:	CVE-2017-2669
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.
Test IDs:	1.3.6.1.4.1.25623.1.0.843131   1.3.6.1.4.1.25623.1.1.4.2017.1250.1   1.3.6.1.4.1.25623.1.0.872622   1.3.6.1.4.1.25623.1.0.872625   1.3.6.1.4.1.25623.1.0.843129   1.3.6.1.4.1.25623.1.0.113215
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2017-2669 BugTraq ID: 97536 http://www.securityfocus.com/bid/97536 Debian Security Information: DSA-3828 (Google Search) https://www.debian.org/security/2017/dsa-3828 https://dovecot.org/pipermail/dovecot-news/2017-April/000341.html http://www.openwall.com/lists/oss-security/2017/04/11/1