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This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
libpng 1.0.6 through 1.0.32, 1.2.0 through 1.2.26, and 1.4.0beta01 through 1.4.0beta19 allows context-dependent attackers to cause a denial of service (crash) and possibly execute arbitrary code via a PNG file with zero length "unknown" chunks, which trigger an access of uninitialized memory.
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Red Hat is aware of this issue and is tracking it via the following bug:
This issue does not affect the version of libpng as shipped with Red Hat Enterprise Linux 3.
Updates for affected versions of Red Hat Enterprise Linux can be found here:
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http://www.securityfocus.com/archive/1/490823/100/0/threaded [No Types Assigned]
http://www.securityfocus.com/archive/1/491424/100/0/threaded [No Types Assigned]
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http://www.securityfocus.com/archive/1/archive/1/491424/100/0/threaded [No Types Assigned]
http://www.securityfocus.com/archive/1/archive/1/503912/100/0/threaded [No Types Assigned]
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10326 [No Types Assigned]
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6275 [No Types Assigned]
http://oval.mitre.org/repository/data/getDef?id=oval:org.mitre.oval:def:10326 [No Types Assigned]
http://oval.mitre.org/repository/data/getDef?id=oval:org.mitre.oval:def:6275 [No Types Assigned]
https://exchange.xforce.ibmcloud.com/vulnerabilities/41800 [No Types Assigned]
http://xforce.iss.net/xforce/xfdb/41800 [No Types Assigned]