A vulnerability has been discovered in Skype, which can be exploited by malicious people to compromise a user's system.
The vulnerability is caused due to a boundary error in Skype4COM.dll within the "skype4com" URI handler when processing short strings. This can be exploited to cause a limited heap-based buffer overflow as a longer string may be copied into a heap-based buffer previously allocated based on the length of the supplied URI.
Successful exploitation allows execution of arbitrary code when a user e.g. visits a malicious website.
The vulnerability is confirmed in Skype 220.127.116.11. Other versions prior to 18.104.22.168 may also be affected.
Solution: Update to version 22.214.171.124 or later.
Provided and/or discovered by: Reported by an anonymous person via ZDI.
Original Advisory: Skype (SKYPE-SB/2007-003):
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Subject: Skype skype4com URI Handler Buffer Overflow
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