[ GLSA 200708-08 ] SquirrelMail G/PGP plugin: Arbitrary code execution

[GLSA]

Gentoo Linux Security Advisory

Title: SquirrelMail G/PGP plugin: Arbitrary code execution (GLSA 200708-08)
Severity: high
Exploitable: remote
Date: August 11, 2007
Bug(s): #185010
ID: 200708-08

Synopsis

Multiple vulnerabilities have been discovered in SquirrelMail, allowing for the remote execution of arbitrary code.

Background

SquirrelMail is a webmail package written in PHP. It supports IMAP and SMTP protocols.

Affected Packages

Package: mail-client/squirrelmail
Vulnerable: < 1.4.10a-r2
Unaffected: >= 1.4.10a-r2
Architectures: All supported architectures


Description

The functions deletekey(), gpg_check_sign_pgp_mime() and gpg_recv_key() used in the SquirrelMail G/PGP encryption plugin do not properly escape user-supplied data.

Impact

An authenticated user could use the plugin to execute arbitrary code on the server, or a remote attacker could send a specially crafted e-mail to a SquirrelMail user, possibly leading to the execution of arbitrary code with the privileges of the user running the underlying web server. Note that the G/PGP plugin is disabled by default.

Workaround

Enter the SquirrelMail configuration directory (/usr/share/webapps/squirrelmail/version/htdocs/config), then execute the conf.pl script. Select the plugins menu, then select the gpg plugin item number in the "Installed Plugins" list to disable it. Press S to save your changes, then Q to quit.

Resolution

All SquirrelMail users should upgrade to the latest version: