GLSA-200408-19 : courier-imap: Remote Format String Vulnerability

This script is Copyright (C) 2004-2014 Tenable Network Security, Inc.


Synopsis :

The remote Gentoo host is missing one or more security-related
patches.

Description :

The remote host is affected by the vulnerability described in GLSA-200408-19
(courier-imap: Remote Format String Vulnerability)

There is a format string vulnerability in the auth_debug() function
which can be exploited remotely, potentially leading to arbitrary code
execution as the user running the IMAP daemon (oftentimes root). A
remote attacker may send username or password information containing
printf() format tokens (such as '%s'), which will crash the server or
cause it to execute arbitrary code.
This vulnerability can only be exploited if DEBUG_LOGIN is set to
something other than 0 in the imapd config file.

Impact :

If DEBUG_LOGIN is enabled in the imapd configuration, a remote attacker
may execute arbitrary code as the root user.

Workaround :

Set the DEBUG_LOGIN option in /etc/courier-imap/imapd to 0. (This is
the default value.)

See also :

http://www.nessus.org/u?efccf26a
http://www.gentoo.org/security/en/glsa/glsa-200408-19.xml

Solution :

All courier-imap users should upgrade to the latest version:
# emerge sync
# emerge -pv '>=net-mail/courier-imap-3.0.5'
# emerge '>=net-mail/courier-imap-3.0.5'

Risk factor :

High / CVSS Base Score : 7.5
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P)

Family: Gentoo Local Security Checks

Nessus Plugin ID: 14575 (gentoo_GLSA-200408-19.nasl)

Bugtraq ID:

CVE ID: CVE-2004-0777