OpenServer 5.0.6 OpenServer 5.0.7 : scosessoin local privilege elevation

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                        SCO Security Advisory

Subject:                OpenServer 5.0.6 OpenServer 5.0.7 : scosessoin local privilege elevation
Advisory number:        SCOSA-2005.5
Issue date:             2005 January 25
Cross reference:        sr886719 fz528461 erg712476 CAN-2003-1021
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1. Problem Description

        A problem has been identified in the scosession program
        when handling strings on the commandline. Because of this,
        a local attacker may be able to gain elevated privileges.

        The Common Vulnerabilities and Exposures project (cve.mitre.org)
        has assigned the name CAN-2003-1021 to this issue.


2. Vulnerable Supported Versions

        System                          Binaries
        ----------------------------------------------------------------------
        OpenServer 5.0.6                /usr/bin/X11/scosession
        OpenServer 5.0.7                /usr/bin/X11/scosession

3. Solution

        The proper solution is to install the latest packages.

4. OpenServer 5.0.6

        4.1 First install oss646b or later

        4.2 Location of oss646c

        ftp://ftp.sco.com/pub/openserver5/oss646c/

        4.3 Verification of oss646c

        MD5 (VOL.000.000) = f19b6c6949f615316bfb075d249989e8
        MD5 (VOL.000.001) = 341ff8553aecd2c7b0c2beaf83030d0f
        MD5 (VOL.000.002) = 6e46708ad8029e12280d4f9ac60ab814
        MD5 (VOL.000.003) = 2868b64a6a6db742adb3b485be645d7e
        MD5 (VOL.000.004) = 1696fe1db9bb063827ee5e76e58dff84
        MD5 (VOL.000.005) = f39da342f8af72fcaccdf478dca04109
        MD5 (VOL.000.006) = 2b31611c8af7d2e7910d6e8e3cf701a6
        MD5 (VOL.000.007) = d0175c0f4e3ed29435b1eab95609f8f4
        MD5 (VOL.000.008) = aa9e8a525c341fed077f981b1dacb486
        MD5 (VOL.000.009) = 8e023af67b57507824406bdda322079a
        MD5 (VOL.000.010) = 2b46e8adba8ae0b64109f2069da978a2

        4.4 Location of Fixed Binaries

        ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2005.5

        4.5 Verification

        MD5 (VOL.000.000) = 953b64f2a068cd188717ebf3c87e9aed

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

        4.6 Installing Fixed Binaries

        Upgrade the affected binaries with the following sequence:

        1) Download the VOL* files to a directory

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


5. OpenServer 5.0.7

        5.1 Location of Fixed Binaries

        ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2005.5

        The fixes are also available in SCO OpenServer Release 5.0.7
        Maintenance Pack 3 or later.  See
        http://www.sco.com/support/update/download/osr507list.html.

        5.2 Verification

        MD5 (VOL.000.000) = 953b64f2a068cd188717ebf3c87e9aed

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


        5.3 Installing Fixed Binaries

        Upgrade the affected binaries with the following sequence:

        1) Download the VOL* files to a directory

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


6. References

        Specific references for this advisory:
                http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-1021

        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 sr886719 fz528461
        erg712476.


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

        SCO would like to thank Joel Soderberg and Christer Oberg
        of Deprotect which describes itself as "a Swedish based
        security company divided into four divisions; Managed
        Security Services, Security Services, Products and Development
        and our Security Academy."

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