Bug 796015 (CVE-2011-4967)

Summary: CVE-2011-4967 tog-pegasus: xml hash table collision CPU usage DoS
Product: [Other] Security Response Reporter: Kurt Seifried <kseifried>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED WONTFIX QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: hamzy, vcrhonek
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2019-06-10 10:58:18 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 770929, 796016    

Description Kurt Seifried 2012-02-22 03:21:10 UTC
Juraj Somorovsky reported that certain XML parsers/servers are affected by the
same, or similar, flaw as the hash table collisions CPU usage denial of
service.  Sending a specially crafted message to an XML service can result in
longer processing time, which could lead to a denial of service.  It is
reported that this attack on XML can be applied on different XML nodes (such as
entities, element attributes, namespaces, various elements in the XML security,
etc.).

pegasus is written in C++ and contains an internal XML parser in XmlParser.cpp, 
upstream was contacted.

Comment 1 Kurt Seifried 2012-08-28 19:54:44 UTC
This is being corrected in pegasus 2.12:

http://bugzilla.openpegasus.org/show_bug.cgi?id=9182

The patches are available at:

http://bugzilla.openpegasus.org/show_bug.cgi?id=9374

The final patch is 170k+ but it's mostly the test cases (the actual patch is just a few dozen lines).