Some vulnerabilities have been discovered in VImpX, which can be exploited by malicious people to overwrite arbitrary files or to compromise a users' system.
1) A boundary error exists in the VImpX.VImpAX ActiveX control (VImpX.ocx) when handling certain properties (e.g. "LogFile", "RejectedRecordsFile"). This can be exploited to cause a stack-based buffer overflow by assigning an overly long (greater than 256 bytes) string to the affected property.
Successful exploitation allows execution of arbitrary code.
2) The VImpX.VImpAX ActiveX control (VImpX.ocx) includes the insecure "ClearLogFile()" and "SaveToFile()" methods, which can be exploited to overwrite and corrupt arbitrary files on the system in the context of the currently logged-on user.
The vulnerabilities are confirmed in version 4.8.8. Other versions may also be affected.
Solution: Set the kill-bit for the affected ActiveX control.
Provided and/or discovered by: 1) Originally discovered by rgod using the "LogFile" property. "RejectedRecordsFile" property vector reported by Saw13.
Original Advisory: 1) http://www.milw0rm.com/exploits/3916
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Subject: VImpX ActiveX Control Buffer Overflow and Insecure Methods
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