Actu
Vigil@nce - libxml2: denial of service via Unbounded Allocations
September 2015 by Vigil@nce
This bulletin was written by Vigil@nce : http://vigilance.fr/offer
SYNTHESIS OF THE VULNERABILITY
An attacker can create malformed XML data, in order to generate a
denial of service in applications linked to libxml2.
Impacted products: libxml2, RHEL.
Severity: 2/4.
Creation date: 22/07/2015.
DESCRIPTION OF THE VULNERABILITY
The libxml2 library implements an XML parser.
However, an XML document build, with a large number of entity
substitutions, especially forces the parser to loop numerous times
("billion laughs" variant attack), to consume a large amount of
memory.
An attacker can therefore create malformed XML data, in order to
generate a denial of service in applications linked to libxml2.
ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN
http://vigilance.fr/vulnerability/libxml2-denial-of-service-via-Unbounded-Allocations-17472
