[Full-disclosure] SCOSA-2006.19 OpenServer 5.0.7 OpenServer 6.0.0 : GhostScript Insecure Temporary File Creation Vulnerability

[SCO Security Advisories <security@xxxxxxx>]

-- 
Dr. Ronald Joe Record
SCO Security Officer
rr@xxxxxxx

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                        SCO Security Advisory

Subject:                OpenServer 5.0.7 OpenServer 6.0.0 : GhostScript 
Insecure Temporary File Creation Vulnerability
Advisory number:        SCOSA-2006.19
Issue date:             2006 April 11
Cross reference:        fz533156
                        CVE-2004-0967 
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1. Problem Description

        Ghostscript is affected by an insecure temporary file creation
        vulnerability.  This issue is likely due to a design error
        that causes the application to fail to verify the existence
        of a file before writing to it.
        
        An attacker may leverage this issue to overwrite arbitrary
        files with the privileges of an unsuspecting user that
        activates the vulnerable application.  Reportedly this issue
        is unlikely to facilitate privilege escalation.
        
        The Common Vulnerabilities and Exposures project
        (cve.mitre.org) has assigned the name CVE-2004-0967 to
        this issue.


2. Vulnerable Supported Versions

        System                          Binaries
        ----------------------------------------------------------------------
        OpenServer 5.0.7                Ghostscript package
        OpenServer 6.0.0                Ghostscript package


3. Solution

        The proper solution is to install the latest packages.


4. OpenServer 5.0.7

        4.1 Location of Fixed Binaries

        ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2006.19


        4.2 Verification

        MD5 (p533156.507_vol.tar) = ae7c290a3b686c4bc01bdd0dc4adc1af

        md5 is available for download from
                ftp://ftp.sco.com/pub/security/tools


        4.3 Installing Fixed Binaries

        Upgrade the affected binaries with the following sequence:

        1) Download p533156.507_vol.tar to a directory.

        2) Extract VOL* files.

           # tar xvf p533156.507_vol.tar

        3) Run the custom command, specify an install
           from media images, and specify the directory as
           the location of the images.


5. OpenServer 6.0.0

        5.1 Location of Fixed Binaries

        ftp://ftp.sco.com/pub/openserver6/600/mp/osr600mp2/osr600mp2.iso


        5.2 Verification

        MD5 (osr600mp2.iso) = 7e560dcde374eb60df2b4a599ac20d8a

        md5 is available for download from
                ftp://ftp.sco.com/pub/security/tools


        5.3 Installing Fixed Binaries

        See the SCO OpenServer Release 6.0.0 Maintenance Pack 2 Release
        and Installation Notes:

        ftp://ftp.sco.com/pub/openserver6/600/mp/osr600mp2/osr600mp2.html


6. References

        Specific references for this advisory:
                http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0967
                http://www.securityfocus.com/bid/11285/references 
                http://secunia.com/advisories/12903/

        SCO security resources:
                http://www.sco.com/support/security/index.html

        SCO security advisories via email
                http://www.sco.com/support/forums/security.html

        This security fix closes SCO incidents fz533156.


7. Disclaimer

        SCO is not responsible for the misuse of any of the information
        we provide on this website and/or through our security
        advisories. Our advisories are a service to our customers intended
        to promote secure installation and use of SCO products.


8. Acknowledgments

        Trustix security engineers are credited with the discovery of
        this vulnerability.

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