REDHAT-BUG-1896120: Buffer Overflow
First published: Mon Nov 09 2020(Updated: )
raptor_xml_writer_start_element_common in raptor_xml_writer.c in Raptor RDF Syntax Library 2.0.15 miscalculates the maximum nspace declarations for the XML writer, leading to heap-based buffer overflows (sometimes seen in raptor_qname_format_as_xml). Reference: <a href="https://www.openwall.com/lists/oss-security/2017/06/07/1">https://www.openwall.com/lists/oss-security/2017/06/07/1</a> Upstream patch: <a href="https://github.com/LibreOffice/core/blob/master/external/redland/raptor/0001-Calcualte-max-nspace-declarations-correctly-for-XML-.patch.1">https://github.com/LibreOffice/core/blob/master/external/redland/raptor/0001-Calcualte-max-nspace-declarations-correctly-for-XML-.patch.1</a>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Redland Libraptor |
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Reference Links
- https://www.openwall.com/lists/oss-security/2017/06/07/1
- https://github.com/LibreOffice/core/blob/master/external/redland/raptor/0001-Calcualte-max-nspace-declarations-correctly-for-XML-.patch.1
- https://github.com/dajobe/raptor/commit/590681e546cd9aa18d57dc2ea1858cb734a3863f
- https://access.redhat.com/errata/RHSA-2021:1842
- https://access.redhat.com/security/cve/cve-2017-18926
- https://bugzilla.redhat.com/show_bug.cgi?id=1896120
Frequently Asked Questions
What is the severity of REDHAT-BUG-1896120?
REDHAT-BUG-1896120 is classified as a high severity vulnerability due to the potential for heap-based buffer overflows.
How do I fix REDHAT-BUG-1896120?
To fix REDHAT-BUG-1896120, upgrade to a patched version of the Raptor RDF Syntax Library that addresses the nspace declaration calculation issue.
What causes the vulnerability REDHAT-BUG-1896120?
The vulnerability REDHAT-BUG-1896120 is caused by miscalculation of the maximum namespace declarations for the XML writer in the Raptor RDF Syntax Library.
What are the potential impacts of REDHAT-BUG-1896120?
The potential impacts of REDHAT-BUG-1896120 include application crashes and potential exploitation leading to arbitrary code execution.
Is REDHAT-BUG-1896120 present in all versions of the Raptor RDF Syntax Library?
REDHAT-BUG-1896120 is specifically associated with version 2.0.15 of the Raptor RDF Syntax Library.
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