SecuriTeam - Multiple Vulnerabilities in Macromedia Flash ActiveX

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Macromedia flash ActiveX plugin displays .swf files under Internet Explorer. Quoting www.macromedia.com: "Over 97.8% of all web users have the Macromedia Flash Player". A Few vulnerabilities were identified in the product:

1) Protected memory reading

2) Memory consumption DoS

3) zlib 1.1.3 double free() bug

4) Buffer overflow in SWRemote parameter provided for the flash object.

Credit:
The information has been provided by LOM.

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Vulnerable systems:
* Macromedia Flash ActiveX 6.0 (6,0,47,0)

The last bug is very close to the one reported by eEye in May. Probably it was not found by eEye because the overflow is a heap based, therefore the exception is triggered in the free() function.

This kind of overflows (heap based Unicode overflow) is exploitable under Internet Explorer. And exploit code is available at: http://www.security.nnov.ru/files/swfexpl.zip

Vendor response:
Macromedia was contacted on 23 Oct 2002. A reply was received on 29 Oct 2002 stating that Macromedia will look into these issues.

Workaround:
Disable ActiveX in Internet Explorer or uninstall flash ActiveX.

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