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Ask the Team  Mailing Lists  Advertising Info  Advisories  About SecuriTeam  Blogs Brought to you by: Suppliers of: Website Testing Tools Network Testing Tools Software Testing Tools SecuriTeam in Your Inbox New vulnerability? New tool? Tell us (Our PGP key). CanSecWest 2012 2nd Annual Cyber Security Hack In Paris	AHG EZshopper loadpage.cgi Directory Traversal (.|./ Attack) 1 Dec. 2004    Summary AHG's EZshopperA directory traversal vulnerability in the EZshopper product allows a remote attacker to disclose sensitive files stored outside the bound HTML root directory.   Credit: The information has been provided by Zero_X www.lobnan.de Team. Website Security Scan Code Vulnerability Test Network Assessment Tool Detect hidden vulnerabilities Exhaustive automated testing Real-time, continuous security Get guidance from professionals of internal or 3rd party code. scanning for your entire network    Details Protect your website! Use an External Vulnerability Scanner! Nothing to install. First report in 1 hour! www.beyondsecurity.com/vulnerability-scanner The EZshopper product makes an effort to prevent attackers from exploiting directory traversal vulnerabilities in the loadpage.cgi, however this prevention mechanism lacks the ability to prevent the attack from happening when the ".|./" is used. This occurs as the URL is first sanitized of its ".." combinations and then of its "|" characters. Vulnerable code: if ($data{'file'}=~/\.\./)  {  print "Content-type: text/html\n\n";  print "Invalid path";  exit;  } $data{'user_id'} =~ s/[\.\|<>]+//g; $data{'file'}=~s/[\|;><]+//g; if ($data{'file'} !~ /\.s?html?$/)  {  print "Content-type: text/html\n\n";  print ".";  exit;  } $file="$root/$data{'file'}"; As can be seen, the program first filters out ".." and then "|", which causes the vulnerability. Example: The following example illustrates the issue: http://targethost/cgi-bin/loadpage.cgi?user_id=id&file=.|./.|./.|./.|./.|./etc/passwd%00.html  Comments: blog comments powered by Disqus	All Sections Security News Unix focus Exploits Tools Windows focus Security Reviews  Related Articles ProFTPD Response Pool Use-After-Free Code Execution Vulnerability Insight Control for Linux Multiple Vulnerabilities HP-UX Running NFS/ONCplus Denial of Service Vulnerability HP-UX Running BIND Denial of Service Vulnerability 2011 HP-UX Running XNTP Denial of Service Vulnerability HP-UX Denial of Service Vulnerability Webkit Detached Body Element Code Execution Vulnerability Mac OS X Compact Font Format Decoder Code Execution Vulnerability WebKit WBR Tag Removal Code Execution Vulnerability Webkit Undefined DOM Prototype Attach Code Execution Vulnerability Apple HFS Information Disclosure Vulnerability XPDF arbitrary Arbitrary Code Execution Vulnerabilities Hewlett-Packard Data Protector Client EXEC_CMD omni_chk_ds.sh Code Execution Vulnerability Red Hat OpenJDK IcedTea6 ClassLoader Code Execution Vulnerability HP-UX Apache Running Tomcat Servlet Engine Remote Modification and Denial of Service Vulnerabilities  Featured Articles ProFTPD Response Pool Use-After-Free Code Execution Vulnerability HP Data Protector Notebook Extension LogClientInstallation SQL Injection Vulnerabilty GE Proficy Historian ihDataArchiver.exe Trusted Header Size Code Execution Vulnerability Novell ZENWorks Software Packaging Antique ActiveX Control Code Execution Vulnerability Adobe Reader U3D IFF RGBA Parsing Code Execution Vulnerability Adobe Reader U3D PCX Parsing Code Execution Vulnerability Cisco Unified Service Monitor brstart add_dm Code Execution Vulnerability
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