Sun JRE / JDK bug introduces XXE possibilities

2008.02.06
Credit: Chris Evans
Risk: Low
Local: Yes
Remote: Yes
CWE: CWE-264


CVSS Base Score: 7.8/10
Impact Subscore: 7.8/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: None
Integrity impact: Partial
Availability impact: Complete

Hi, Now that Sun has fixed this in JDK6u4, I thought this might be of interest to people: http://scarybeastsecurity.blogspot.com/ Essentially, one common XXE protection method was broken in the default XML parser, in JDK6. In particular, I'm worried about web services (and other server-side XML accepting technologies) deployed under JDK6. I haven't had time to look into common web service frameworks and see how they implement XXE protection. Might be interesting to look into specific technologies that broke. Cheers Chris


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