GLSA 200408-02: Courier: Cross-site scripting vulnerability in SqWebMail

http://security.gentoo.org/

Severity:	normal
Title:	Courier: Cross-site scripting vulnerability in SqWebMail
Date:	08/04/2004
Bugs:	#58020
ID:	200408-02

Synopsis

The SqWebMail web application, included in the Courier suite, is vulnerable to cross-site scripting attacks.

Background

Courier is an integrated mail and groupware server based on open protocols. It provides ESMTP, IMAP, POP3, webmail, and mailing list services within a single framework. The webmail functionality included in Courier called SqWebMail allows you to access mailboxes from a web browser.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
mail-mta/courier	<= 0.45.6	>= 0.45.6.20040618	All supported architectures

Description

Luca Legato found that SqWebMail is vulnerable to a cross-site scripting (XSS) attack. An XSS attack allows an attacker to insert malicious code into a web-based application. SqWebMail doesn't filter appropriately data coming from message headers before displaying them.

Impact

By sending a carefully crafted message, an attacker can inject and execute script code in the victim's browser window. This allows to modify the behaviour of the SqWebMail application, and/or leak session information such as cookies to the attacker.

Workaround

There is no known workaround at this time. All users are encouraged to upgrade to the latest available version of Courier.

Resolution

All Courier users should upgrade to the latest version:

    # emerge sync

    # emerge -pv ">=mail-mta/courier-0.45.6.20040618"
    # emerge ">=mail-mta/courier-0.45.6.20040618"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200408-02.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.