[NEWS] Sun Microsystems Java GIF File Parsing Memory Corruption Vulnerability

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Sun Microsystems Java GIF File Parsing Memory Corruption Vulnerability
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SUMMARY

This vulnerability allows attackers to execute arbitrary code on
vulnerable installations of Sun Microsystems Java Virtual Machine (JVM).
User interaction is required to exploit this vulnerability in that the
target must visit a malicious website.

DETAILS

Affected Products:
* JDK and JRE version 5.0 Update 9 and earlier (all platforms)
* SDK and JRE version 1.4.2_12 and earlier (all platforms)
* SDK and JRE version 1.3.1_18 and earlier (all platforms)

The specific flaw exists during the parsing of GIF image components. When
the image width in an image block of a valid GIF file is set to 0, the
Java runtime will allocate the specified size but subsequently copy all
data to the under allocated memory chunk. The overflow results in the
corruption of multiple pointers, at least one of which is later
dereferenced and can therefore result in execution of arbitrary code.

Vendor Response:
Sun has issued an update to correct this vulnerability. More details can
be found at:
<http://www.sunsolve.sun.com/search/document.do?assetkey=1-26-102760-1>
http://www.sunsolve.sun.com/search/document.do?assetkey=1-26-102760-1

Disclosure Timeline:
2006.06.16 - Vulnerability reported to vendor
2006.12.18 - Digital Vaccine released to TippingPoint customers
2007.01.16 - Coordinated public release of advisory

CVE Information:
<http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-0243>
CVE-2007-0243


ADDITIONAL INFORMATION

The information has been provided by <mailto:zdi-disclosures@xxxxxxxx>
ZeroDay Initiative.
The original article can be found at:
<http://www.zerodayinitiative.com/advisories/ZDI-07-005.html>
http://www.zerodayinitiative.com/advisories/ZDI-07-005.html



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