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Java XML Signature Denial Of Service Attack

Java XML Signature Denial Of Service Attack
Posted Dec 20, 2013
Authored by Colm O hEigeartaigh

The Apache Santuario XML Security for Java project is vulnerable to a Denial of Service (DoS) type attack leading to an OutOfMemoryError, which is caused by allowing Document Type Definitions (DTDs) when applying Transforms. From the 1.5.6 release onwards, DTDs will not be processed at all when the "secure validation" mode is enabled.

tags | advisory, java, denial of service
advisories | CVE-2013-4517
SHA-256 | 8718e8b28ba92f0c8d1021a89a00f91b0c89c346b43d6b5dba5031eb339cb16c

Java XML Signature Denial Of Service Attack

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CVE-2013-4517: Java XML Signature DoS Attack

Severity: Major

Vendor: The Apache Software Foundation

Versions Affected:

This vulnerability affects all released versions of Apache Santuario XML
Security for Java.

Description:

The Apache Santuario XML Security for Java project is vulnerable to a Denial
of Service (DoS) type attack leading to an OutOfMemoryError, which is caused
by allowing Document Type Definitions (DTDs) when applying Transforms. From
the 1.5.6 release onwards, DTDs will not be processed at all when the "secure
validation" mode is enabled. For more information on the secure validation
property, please refer to the FAQ:

http://santuario.apache.org/faq.html

This has been fixed in revision:

http://svn.apache.org/viewvc?view=revision&revision=1537956

Migration:

1.4.x users should upgrade to 1.5.6 as soon as possible.
1.5.x users should upgrade to 1.5.6 as soon as possible.

Credit: This issue was reported by James Forshaw, Context Information Security

References: http://santuario.apache.org/secadv.html
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