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SquirrelMail: Cross-site scripting and IMAP command injection


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200603-09 / squirrelmail
Release Date March 12, 2006
Latest Revision March 12, 2006: 01
Impact low
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
mail-client/squirrelmail < 1.4.6 >= 1.4.6 All supported architectures

Related bugreports: #123781


SquirrelMail is vulnerable to several cross-site scripting vulnerabilities and IMAP command injection.

2.  Impact Information


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


SquirrelMail does not validate the right_frame parameter in webmail.php, possibly allowing frame replacement or cross-site scripting (CVE-2006-0188). Martijn Brinkers and Scott Hughes discovered that MagicHTML fails to handle certain input correctly, potentially leading to cross-site scripting (only Internet Explorer, CVE-2006-0195). Vicente Aguilera reported that the sqimap_mailbox_select function did not strip newlines from the mailbox or subject parameter, possibly allowing IMAP command injection (CVE-2006-0377).


By exploiting the cross-site scripting vulnerabilities, an attacker can execute arbitrary scripts running in the context of the victim's browser. This could lead to a compromise of the user's webmail account, cookie theft, etc. A remote attacker could exploit the IMAP command injection to execute arbitrary IMAP commands on the configured IMAP server.

3.  Resolution Information


There is no known workaround at this time.


All SquirrelMail users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=mail-client/squirrelmail-1.4.6"

Note: Users with the vhosts USE flag set should manually use webapp-config to finalize the update.

4.  References


Page updated March 12, 2006

Summary: This is a Gentoo Linux Security Advisory

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