[UNIX] SAP Internet Graphics Server Directory Traversal

From: SecuriTeam (support_at_securiteam.com)
Date: 08/08/05

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Date: 8 Aug 2005 15:30:03 +0200

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      SAP Internet Graphics Server Directory Traversal
    ------------------------------------------------------------------------

    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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