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Overwrite any file via desname in Oracle Reports
Details Oracle Reports is Oracle's award-winning, high-fidelity enterprise reporting tool. It enables businesses to give immediate access to information to all levels within and outside of the organization in an unrivaled scalable and secure environment. Oracle Reports, a component of the Oracle Application Server, is used by Oracle itself for the E-Business Suite. Many large customers are using Oracle Reports as reporting tool for their enterprise applications. By specifing a special value for the parameter desname Oracle Reports can overwrite any file on the application server. On Windows systems an attacker can overwrite any files (e.g. boot.ini) on the application server. On UNIX system an attacker can overwrite all files (e.g. opmn.xml) which belongs to the Oracle Application Server user. This attack can be done with a simple URL. Affected Products Internet Application Server Oracle Application Server Oracle Developer Suite Patch Information This bug is NOT FIXED with Critical Patch Update October 2005 (CPU October 2005). It seems that Oracle is NOT INTERESTED to fix this issue and provide patches for this issue. If you think you need a patch to protect your Oracle Application Server you should contact Oracle. Testcase Will be provided if a patch is available. Workaround for Oracle Reports (Workaround changed 16.09.2005) Use URLRewrite to block potential dangerous URLs containing the desname parameter. For Windows Systems RewriteCond %{QUERY_STRING} (.*)destype=file(.*) [NC] RewriteCond %{QUERY_STRING} (.*)desname=(.*) [NC] RewriteCond %{QUERY_STRING} !(.*)desname=c:\\Oracle\\report_destination\\[A-Za-z0-9](.*) [NC] RewriteLog c:\Oracle\oas904\Apache\Apache\logs\rewrite_rep.log RewriteLogLevel 3 RewriteEngine OnRewriteRule (.*)reports(.*)$ /forbidden.htm [R] [NC] For Unix Systems RewriteCond %{QUERY_STRING} (.*)destype=file(.*) [NC] RewriteCond %{QUERY_STRING} (.*)desname=(.*) [NC] RewriteCond %{QUERY_STRING} !(.*)desname=/oracle/report_destination/[A-Za-z0-9](.*) [NC] RewriteRule (.*)reports(.*)$ /forbidden.htm [R] [NC] RewriteLog /oracle/oas904/Apache/Apache/logs/rewrite_rep.log RewriteLogLevel 3 RewriteEngine On If you need the desname parameter in your URL you can create a new entry in the cgicmd.dat (e.g. mykey: desname=myoutput.pdf). Don't forget to protect the content of your cgicmd.dat by setting the environment variable REPORTS_CGINODIAG=YES (see Metalink article 274858.1). History 12-aug-2003 Oracle secalert was informed 26-sep-2003 Bug confirmed 15-apr-2005 Red-Database-Security informed Oracle secalert that this vulnerability will publish after CPU July 2005 Red-Database-Security offered Oracle more time if it is not possible to provide a fix ==> NO FEEDBACK. 12-jul-2005 Oracle published CPU July 2005 without fixing this issue 18-jul-2005 Red-Database-Security published this advisory 21-jul-2005 Cert VU# and affected products added 25-aug-2005 CVE number added 16-sep-2005 Workaround was incomplete and is now hopefully correct (Thanks to D. Nachbar for this information) © 2005 by Red-Database-Security GmbH - last update 03-nov-2005 |
Oracle Reports |
