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[ GLSA 200903-19 ] Xerces-C++: Denial of Service
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PostPosted: Mon Mar 09, 2009 10:26 pm    Post subject: [ GLSA 200903-19 ] Xerces-C++: Denial of Service Reply with quote

Gentoo Linux Security Advisory

Title: Xerces-C++: Denial of Service (GLSA 200903-19)
Severity: normal
Exploitable: remote
Date: March 09, 2009
Bug(s): #240496
ID: 200903-19

Synopsis

An error in Xerces-C++ allows for a Denial of Service via malicious XML schema files.

Background

Xerces-C++ is a validating XML parser written in a portable subset of C++.

Affected Packages

Package: dev-libs/xerces-c
Vulnerable: < 3.0.0-r1
Unaffected: >= 3.0.0-r1
Architectures: All supported architectures


Description

Frank Rast reported that the XML parser in Xerces-C++ does not correctly handle an XML schema definition with a large maxOccurs value, which triggers excessive memory consumption during the validation of an XML file.

Impact

A remote attacker could entice a user or automated system to validate an XML file using a specially crafted XML schema file, leading to a Denial of Service (stack consumption and crash).

Workaround

There is no known workaround at this time.

Resolution

All Xerces-C++ users should upgrade to the latest version:
Code:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/xerces-c-3.0.0-r1"


References

CVE-2008-4482
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