Secunia Advisory - A problem lies in Sun Java where JAXP cannot handle XML documents with deeply nested entity definitions. This can be exploited to consume 100% CPU resources by users with access to Java based applications which accepts and parses XML documents.
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TITLE:
Sun Java JAXP Nested Entity Definitions Denial of Service
SECUNIA ADVISORY ID:
SA9797
VERIFY ADVISORY:
http://www.secunia.com/advisories/9797/
CRITICAL:
Less critical
IMPACT:
DoS
WHERE:
From remote
SOFTWARE:
Sun Java JRE 1.3.x
Sun Java JRE 1.4.x
Sun Java SDK 1.3.x
Sun Java SDK 1.4.x
DESCRIPTION:
A vulnerability has been identified in Sun Java, which can be
exploited by malicious people to cause a Denial of Service.
The problem is that JAXP can't handle XML documents with deeply
nested entity definitions. This can be exploited to consume 100% CPU
resources by users with access to Java based applications which
accepts and parses XML documents.
An example document has been provided in the original advisory.
All versions prior to 1.4.2_01 are vulnerable.
SOLUTION:
Version 1.4.2_01 is not vulnerable to this issue.
http://java.sun.com/j2se/1.4.2/download.html
ORIGINAL ADVISORY:
http://java.sun.com/j2se/1.4.2/relnotes.html#JAXP_security
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