J-Security Center

Title: PHPSlash URL Block Arbitrary File Disclosure Vulnerability

Severity: LOW

Description:

PHPSlash is a widely used open source Groupware utility.

In PHP, a URL block is a configurable box which is used to display small amounts of information to a website, such as time/date or weather information.

The method used in the Block_render_url.class of PHPSlash fails to check the content of a URL. A user may read arbitrary files by entering a URL that is a relative link to the file they wish to read. Unpriviledged users may read the file if it displayed on the webpage. This can only be exploited by users who have access to editing blocks.

Exploitation may result in attackers gaining local access to the webserver or information which could assist in further attacks.

Affected Products:

  • PHPSlash PHPSlash 0.5.32
  • PHPSlash PHPSlash 0.6.1

References:

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