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SAP Internet Graphics Server Directory Traversal
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SUMMARY
The Internet Graphics Server (IGS) is "a subcomponent of the SAP R/3
enterprise environment, which is accessible over HTTP via a minimalist web
server component".
By entering an HTTP document path that incorporates a directory traversal
(../..) sequence, documents outside of the web root can be accessed with
the privileges of the user that was used to start the IGS service.
DETAILS
Vulnerable Systems:
* SAP prior to version 6.40 Patch 11
The IGS product does not appear to validate the document path that is
passed to it, prior to using operating system functions to access and
retrieve the documents.
Proof of Concept:
The exact path required to perform the traversal is dependent on the
actual implementation of the product, and the directory to which it is
installed. On the HP-UX platform, a working traversal path is:
http://host/htdocs/../../../../../../../../../../../../etc/passwd
Recommendations:
Upgrade to the latest version of the SAP IGS software, version 6.40 Patch
11.
Note: Corsaire has not had the opportunity to examine the patch, so can
not vouch for whether it truly resolves the validation issues, or merely
obscures them.
If the IGS component is not required, it can be deactivated using the
process described in SAP Note 862169.
CVE Information:
<http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1691>
CAN-2005-1691
ADDITIONAL INFORMATION
The information has been provided by <mailto:martin.oneal@corsaire.com>
Martin O'Neal.
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