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CVE-2016-3705

Description

The (1) xmlParserEntityCheck and (2) xmlParseAttValueComplex functions in parser.c in libxml2 2.9.3 do not properly keep track of the recursion depth, which allows context-dependent attackers to cause a denial of service (stack consumption and application crash) via a crafted XML document containing a large number of nested entity references.

POC

Reference

- http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html

- http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html

- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html

- https://kc.mcafee.com/corporate/index?page=content&id=SB10170

Github

- https://github.com/ARPSyndicate/cvemon