Bug 971436 - (CVE-2013-2153) CVE-2013-2153 xml-security-c: Signature verification bypass flaw via EntityReference nodes in Reference elements
CVE-2013-2153 xml-security-c: Signature verification bypass flaw via EntityRe...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20130618,repor...
: Security
Depends On: 975305 975304
Blocks: 971467
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Reported: 2013-06-06 09:51 EDT by Jan Lieskovsky
Modified: 2013-06-18 00:24 EDT (History)
1 user (show)

See Also:
Fixed In Version: xml-security-c-1.7.1
Doc Type: Bug Fix
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Description Jan Lieskovsky 2013-06-06 09:51:54 EDT
A security flaw was found in the way Apache Santuario-C++ (AKA xml-security-c), a C++ language implementation of W3C security standards for XML, processed certain DSIG <Reference> elements. When loading the XML file and reviewing the content of a <Reference> elements used by the signer in the Signature, the xml-security-c library was (previously) not checking if that element did not contain EntityReference nodes, which allowed an attacker to bypass the signature verification process (make the signature verification process to succeed also for arbitrary forged content).

Upstream advisory:
[1] http://santuario.apache.org/secadv.data/CVE-2013-2153.txt

Relevant patch:
[2] http://svn.apache.org/viewvc?view=revision&revision=r1493959

Acknowledgements:

Red Hat would like to thank Scott Cantor of Apache Santuario-C++ upstream for reporting of this issue. Upstream acknowledges James Forshaw of Context Information Security as the original issue reporter.
Comment 2 Jan Lieskovsky 2013-06-06 09:55:19 EDT
This issue affects the versions of the xml-security-c package, as shipped with Fedora release of 17 and 18.

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This issue affects the versions of the xml-security-c package, as shipped with Fedora EPEL-5 and Fedora EPEL-6.
Comment 3 Huzaifa S. Sidhpurwala 2013-06-18 00:16:31 EDT
Public via:

http://santuario.apache.org/secadv.data/CVE-2013-2153.txt
Comment 4 Huzaifa S. Sidhpurwala 2013-06-18 00:21:52 EDT
Created xml-security-c tracking bugs for this issue

Affects: fedora-all [bug 975304]
Affects: epel-all [bug 975305]

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