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			SCO Security Advisory

Subject:		OpenServer 5.0.6 OpenServer 5.0.7 : enable command line buffer overflows
Advisory number: 	SCOSA-2005.13
Issue date: 		2005 February 07
Cross reference:	sr875254 fz527477 erg712243 CAN-2004-1131
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1. Problem Description

Davide Del Vecchio reported a buffer overflow in HPUX that
affected the disable command. This caused us to take a
closer look at the enable and disable commands in SCO
OpenServer. 

The system is designed to allow an administrator to give out 
subsystem privileges. If a user has been given the "lp" 
privilegee, he could run enable/disable and possably
gain root privileges. Regular users can't run enable and
disable. 

The Common Vulnerabilities and Exposures project (cve.mitre.org) 
has assigned the name CAN-2004-1131 to this issue.


2. Vulnerable Supported Versions

System Binaries
----------------------------------------------------------------------
OpenServer 5.0.6 /usr/bin/enable
OpenServer 5.0.7 /usr/bin/enable


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-2004.22


4.6 Verification

MD5 (VOL.000.000) = 22a9b1e92f54fd33931a3ca63e74d04c

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 the 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

        Maintenance Pack 3

        http://www.sco.com/support/update/download/osr507list.html

        5.2 Verification

        MD5 (507mp3_vol.tar) = c927aefdd50b50aca5d29e08c1562aec

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

        5.3 Installing Fixed Binaries

        See the Maintenance Pack 3 Release Notes

        ftp://ftp.sco.com/pub/openserver5/507/mp/mp3/osr507mp3.html
        or
        ftp://ftp.sco.com/pub/openserver5/507/mp/mp3/osr507mp3.txt


6. References

Specific references for this advisory:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1131 
http://www.securityfocus.com/bid/6845

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 sr875254 fz527477
erg712243.


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 Davide Del Vecchio.

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