libxml2, possibly before 2.5.0, does not properly detect recursion
during entity expansion, which allows context-dependent attackers to
cause a denial of service (memory and CPU consumption) via a crafted
XML document containing a large number of nested entity references,
aka the "billion laughs attack."
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MLIST:[xml-dev] 20030202 Re: Elliotte Rusty Harold on Web Services
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