Skype bug could expose users to malicious code attack
The latest version of Skype for Windows contains a security vulnerability that allows attackers to inject potentially dangerous code into a user’s phone session, a German security researcher has reported.
The XSS, or cross-site scripting, vulnerability in Skype 22.214.171.124 is the result of the voice-over-IP client failing to inspect user-supplied phone numbers for malicious code, researcher Levent Kayan said. As a result, attackers might be able to exploit the bug to inject commands or scripts that hijack the machine running the program.
A screen shot from Kayan’s website showing the injection bug in action
Such vulnerabilities open the possibility of creating self-replicating attacks if they can be used to target users contained in each victim’s contact list. As each new user is exploited, the worm spreads virally by attacking a whole new set of people. A vulnerability reported in May for Mac versions of Skype was described as wormable, though there are no reports it was ever exploited in the wild. It’s unclear if the current vulnerability is also self-replicating.
Microsoft is in the process of acquiring the popular internet-based phone service. ®