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[ISN] Critical Flaws Found in Java Development Kit


By Brian Prince
May 17, 2007

Two vulnerabilities open to remote exploitation by hackers have been 
found in Java Development Kit, one of which could be used to take over a 
compromised system.

JDK (Java Development Kit) is a software development tool made by Sun 
Microsystems specifically for Java users. The vulnerabilities were rated 
"critical" by FrSIRT (French Security Incident Response Team), a 
security research organization based in France.

One flaw is caused by an integer overflow error in the image parser when 
processing ICC profiles embedded within JPEG images, according to FrSIRT 

Security experts at Secunia outlined the dangers of the flaw in a 
separate advisory. "This can be exploited to crash the JVM and 
potentially allow the execution of arbitrary code by e.g. tricking an 
application using the JDK to process a malicious image file," Secunia 
security experts stated.

The second vulnerability is caused by an error in the BMP image parser 
when processing malformed files on Unix/Linux systems, which could be 
exploited by attackers to cause a denial of service. Both flaws affect 
Sun JDK version 1.x.

Users can find an answer to both vulnerabilities by upgrading to JDK 
versions 1.5.0_11-b03 or 1.6.0_01-b06.

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