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TITLE:
libxml2 DTD Parsing Denial of Service Vulnerabilities

SECUNIA ADVISORY ID:
SA36207

VERIFY ADVISORY:
http://secunia.com/advisories/36207/

DESCRIPTION:
Some vulnerabilities have been reported in libxml2, which can be
exploited by malicious people to cause a DoS (Denial of Service).

1) An error when parsing certain DTD ELEMENT definitions can be
exploited to cause a crash via a specially crafted XML file.

2) Multiple use-after-free errors when parsing notation and
enumeration attributes in DTD definitions can be exploited to e.g.
cause a crash via a specially crafted XML file.

SOLUTION:
Fixed in the GIT repository.
http://git.gnome.org/cgit/libxml2/commit/?id=489f9671e71cc44a97b23111b3126ac8a1e21a59

PROVIDED AND/OR DISCOVERED BY:
Jukka Taimisto, Tero Rontti, and Rauli Kaksonen from the CROSS
project at Codenomicon Ltd, reported via CERT-FI

ORIGINAL ADVISORY:
libxml2:
http://git.gnome.org/cgit/libxml2/commit/?id=489f9671e71cc44a97b23111b3126ac8a1e21a59

CERT-FI:
http://www.cert.fi/en/reports/2009/vulnerability2009085.html

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