Sophos Web Appliance before 3.7.8.2 allows (1) remote attackers to execute arbitrary commands via shell metacharacters in the client-ip parameter to the Block page, when using the user_workstation variable in a customized template, and remote authenticated users to execute arbitrary commands via shell metacharacters in the (2) url parameter to the Diagnostic Tools functionality or (3) entries parameter to the Local Site List functionality.
Use CWE-78, Sophos vendor hub and Web Appliance Firmware product page to widen CVE-2013-2642 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2013-4983, CVE-2014-2850 and CVE-2014-2849 for nearby disclosures in the same product family.