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Apache XML Security Library Buffer Overflows

Apache XML Security Library Buffer Overflows
Posted Jul 7, 2011
Authored by Scott Cantor

Apache Santuario XML Security for C++ library versions prior to 1.6.1 suffer from multiple buffer overflows when signing and verifying large keys.

tags | advisory, overflow
advisories | CVE-2011-2516
SHA-256 | 7d90e9019ddd3fff89b181daaaed2d5e7ba0b2a6e22d003a938dd0aae8c79f8e

Apache XML Security Library Buffer Overflows

Change Mirror Download
CVE-2011-2516: Apache Santuario XML Security for C++ contains buffer
overflows signing or verifying with large keys.

Severity: Important

Vendor: The Apache Software Foundation

Versions Affected: Apache Santuario XML Security for C++ library versions
prior to V1.6.1

Description: A buffer overflow exists when creating or verifying XML
signatures
with RSA keys of sizes on the order of 8192 or more bits. This typically
results
in a crash and denial of service in applications that verify signatures
using
keys that could be supplied by an attacker.

Mitigation: Applications using library versions older than V1.6.1 should
upgrade
as soon as possible. Distributors of older versions should apply the
patches
from this subversion revision:

http://svn.apache.org/viewvc?view=revision&revision=1125752

Applications that can prevent the use of arbitrary keys supplied by an
attacker
(such as within the ds:KeyInfo element of a signature), or limit key
sizes, may
prevent the exploitation of this bug.

Credit: This issue was reported by Paulo Zanoni.

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

Scott Cantor
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