LiveZilla Multiple Stored XSS in webbased operator client


Author: Jakub Zoczek [zoczus@gmail.com] CVE Reference: CVE-2013-7032 Product: LiveZilla Vendor: LiveZilla GmbH [http://livezilla.net] Affected version: Severity: Medium CVSSv2 Score: 4.3 (AV:N/AC:M/Au:N/C:N/I:P/A:N) Status: Fixed 0x01 Background LiveZilla, the widely-used and trusted Live Help and Live Support System. 0x02 Description LiveZilla in version is prone to multiple stored cross-site scripting vulnerabilities in Webbased Operator Client. Attacker is able to execute arbitrary javascript code in context of operator browser by providing xss payloads into unfiltered fields - details below. 0x03 Proof of Concept - File Names - this issue is really similar to CVE-2013-7003. LiveZilla fixed it by escaping displayed file name when customer want send it to operator. Unfortunately it is unescaped after succesful upload. - Also - after upload LiveZilla creates 'resources' with those files. Filenames are escaped properly there, but names of customers don't. We can use simple, widely-known XSS payloads to exploit this vulnerability. 0x04 Fix Vulnerability was fixed in LiveZilla version. 0x05 Timeline 08.12.2013 - Vendor notified 09.12.2013 - Vendor responded with informations about planned release 10.12.2013 - Version released 15.12.2013 - Public Disclosure