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CVE-2011-4318

Status Candidate

Overview

Dovecot 2.0.x before 2.0.16, when ssl or starttls is enabled and hostname is used to define the proxy destination, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via a valid certificate for a different hostname.

Related Files

Red Hat Security Advisory 2013-0520-02
Posted Feb 21, 2013
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2013-0520-02 - Dovecot is an IMAP server, written with security primarily in mind, for Linux and other UNIX-like systems. It also contains a small POP3 server. It supports mail in either of maildir or mbox formats. The SQL drivers and authentication plug-ins are provided as sub-packages. Two flaws were found in the way some settings were enforced by the script-login functionality of Dovecot. A remote, authenticated user could use these flaws to bypass intended access restrictions or conduct a directory traversal attack by leveraging login scripts.

tags | advisory, remote, imap
systems | linux, redhat, unix
advisories | CVE-2011-2166, CVE-2011-2167, CVE-2011-4318
SHA-256 | cc2d82431b7724dffbd1e1d10167102f8893f413a9eb44dd0dce08dd119b4ef9
Ubuntu Security Notice USN-1295-1
Posted Dec 9, 2011
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1295-1 - It was discovered that Dovecot incorrectly validated certificate hostnames when being used as a POP3 and IMAP proxy. If a remote attacker were able to perform a man-in-the-middle attack, this flaw could be exploited to view sensitive information.

tags | advisory, remote, imap
systems | linux, ubuntu
advisories | CVE-2011-4318
SHA-256 | 6537b446fcea6b049718ea977697f880df756abeecdad9dba3605ca876e59b50
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