1. Gentoo Linux Security Advisory
| Advisory Reference | GLSA 200501-39 / SquirrelMail |
| Release Date | January 28, 2005 |
| Latest Revision | January 28, 2005: 01 |
| Impact | high |
| Exploitable | remote |
| Package | Vulnerable versions | Unaffected versions | Architecture(s) |
| mail-client/squirrelmail | <= 1.4.3a-r2 | >= 1.4.4 | All supported architectures |
Related bugreports: #78116
SquirrelMail fails to properly sanitize user input, which could lead to arbitrary code execution and compromise webmail accounts.
SquirrelMail is a webmail package written in PHP. It supports IMAP and SMTP and can optionally be installed with SQL support.
SquirrelMail fails to properly sanitize certain strings when decoding specially-crafted strings, which can lead to PHP file inclusion and XSS.
By sending a specially-crafted URL, an attacker can execute arbitrary code from the local system with the permissions of the web server. Furthermore by enticing a user to load a specially-crafted URL, it is possible to display arbitrary remote web pages in Squirrelmail's frameset and 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.
The arbitrary code execution is only possible with "register_globals" set to "On". Gentoo ships PHP with "register_globals" set to "Off" by default. There are no known workarounds for the other issues 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-1.4.4" |
Note: Users with the vhosts USE flag set should manually use webapp-config to finalize the update.