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Insecure Library Loading
Moderately critical

libxml2 DTD Parsing Denial of Service Vulnerabilities

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Release Date:  2009-08-11    Last Update:  2010-11-12    Views:  5,740

Secunia Advisory SA36207

Where:

From remote

Impact:

DoS

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

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:
Update to version 2.7.7.

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

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: libxml2 DTD Parsing Denial of Service Vulnerabilities

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