TUCoPS :: Apple(multi) :: bt-21628.htm

Apple QuickTime FlashPix Sector Size Overflow Vulnerability
ZDI-09-064: Apple QuickTime FlashPix Sector Size Overflow Vulnerability
ZDI-09-064: Apple QuickTime FlashPix Sector Size Overflow Vulnerability

ZDI-09-064: Apple QuickTime FlashPix Sector Size Overflow Vulnerability
September 10, 2009

-- CVE ID:

-- Affected Vendors:

-- Affected Products:
Apple Quicktime

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 8414.
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-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Apple QuickTime. User interaction is
required to exploit this vulnerability in that the target must visit a
malicious page or open a malicious file.

The specific flaw exists during the parsing of malformed FlashPix (.fpx)
files. While parsing the SectorShift and cSectFat fields from the
header, the application will multiply 2 user-controlled 32-bit values
and utilize this for an allocation. If the result of the multiplication
is greater than 32bits, the application will allocate an undersized heap
chunk. Later, the application will copy file data directly into this
buffer leading to a buffer overflow which can allow for code execution
under the context of the currently logged in user.

-- Vendor Response:
Apple has issued an update to correct this vulnerability. More
details can be found at:


-- Disclosure Timeline:
2009-07-28 - Vulnerability reported to vendor
2009-09-10 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Damian Put

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