[Full-disclosure] SCOSA-2006.23 UnixWare 7.1.4 : 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:                UnixWare 7.1.4 : GhostScript Insecure Temporary File 
Creation Vulnerability
Advisory number:        SCOSA-2006.23
Issue date:             2006 May 09
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
        ----------------------------------------------------------------------
        UnixWare 7.1.4                  Ghostscript package


3. Solution

        The proper solution is to install the latest packages.


4. UnixWare 7.1.4

        4.1 Location of Fixed Binaries

        ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2006.23


        4.2 Verification

        MD5 (p533156.714.image) = 64ad569588eff4ac2c8a3a1e07151847

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


        4.3 Installing Fixed Binaries

        The following packages should be installed on your system before
        you install this fix:

                UnixWare 7.1.4 Maintenance Pack 3
                http://www.sco.com/support/update/download/release.php?rid=126

                ptf9052
                http://www.sco.com/support/update/download/release.php?rid=160

        Upgrade the affected binaries with the following sequence:

        Download p533156.714.image to the /var/spool/pkg directory

        # pkgadd -d /var/spool/pkg/p533156.714.image


5. References

        Specific references for this advisory:
                http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0967
                http://www.securityfocus.com/bid/11285 
                http://secunia.com/advisories/12903/ 
                http://secunia.com/advisories/17135 
                http://www.cs.wisc.edu/~ghost/

        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.


6. 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.


7. Acknowledgments

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

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