SquirrelMail multiple vulnerabilities

Multiple vulnerabilities have been reported in SquirrelMail, according to Secunia. These vulnerabilities can be exploited by malicious users to conduct script insertion attacks and by malicious people to conduct script insertion and cross-site scripting attacks and bypass certain security restrictions.

1. Certain input passed in style tags in messages is not properly sanitised in functions/mime.php before being used. This can be exploited to insert arbitrary HTML and script code, which will be executed in a user’s browser session in context of an affected site when the malicious data is being viewed.

2. Certain input passed in drop-down selection lists is not properly sanitised in functions/options.php before being used. This can be exploited to insert arbitrary HTML and script code, which will be executed in a user’s browser session in context of an affected site when the malicious data is being viewed.

3. Certain input passed to the SquirrelSpell spellchecking feature and the index order page is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user’s browser session in context of an affected site.

4. The application allows users to perform certain actions via HTTP requests without performing any validity checks to verify the requests. This can be exploited to e.g. disclose user passwords by tricking a user into clicking a specially crafted link via clickjacking.

The vulnerabilities are reported in version 1.4.21 and prior.

Solution: Fixed in the SVN repository.