OpenServer 5.0.6 OpenServer 5.0.7 : termsh atcronsh auditsh environment buffer overflows

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                    SCO Security Advisory

Subject: OpenServer 5.0.6 OpenServer 5.0.7 : termsh atcronsh
auditsh environment buffer overflows
Advisory number: SCOSA-2005.15
Issue date: 2005 April 7
Cross reference: sr875152 fz527464 erg712238 sr886656 fz528456 erg712472
sr886657 fz528457 erg712473 CAN-2005-0351

1. Problem Description

    A very long HOME environment variable will cause a buffer
    overflow in auditsh, atcronsh and termsh. 
   
    506 requires
    OSS646C installed prior to installation of this fix 
   
    The Common Vulnerabilities and Exposures project (cve.mitre.org)
    has assigned the name CAN-2005-0351 to this issue.
   

2. Vulnerable Supported Versions

    System                          Binaries
    ----------------------------------------------------------------------
    OpenServer 5.0.6                /usr/lib/sysadm/auditsh
                                    /usr/lib/sysadm/termsh
                                    /usr/lib/sysadm/atcronsh
   
    OpenServer 5.0.7                /usr/lib/sysadm/auditsh
                                    /usr/lib/sysadm/termsh
                                    /usr/lib/sysadm/atcronsh
   

3. Solution

    The proper solution is to install the latest packages.
   

4. OpenServer 5.0.6

    4.1 First install oss646c 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 Installation of oss646c
   
    See ftp://ftp.sco.com/pub/openserver5/oss646c/oss646c.txt
   
    4.5 Location of Fixed Binaries
   
    ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2005.15
   
    4.6 Verification
   
    MD5 (VOL.000.000) = 3b47d83661354009a73acbd2979c4d0c
   
    md5 is available for download from
            ftp://ftp.sco.com/pub/security/tools
   
   
    4.7 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-2005.15
   
    5.2 Verification
   
    MD5 (VOL.000.000) = 3b47d83661354009a73acbd2979c4d0c
   
    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-2005-0351
   
    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 sr875152 fz527464
    erg712238 sr886656 fz528456 erg712472 sr886657 fz528457
    erg712473.
   

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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