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SCO Security Advisory

Subject: OpenServer 5.0.6 OpenServer 5.0.7 : nwprint privilege escalation
Advisory number: SCOSA-2005.26
Issue date: 2005 May 25
Cross reference: sr893493 fz531721 erg712826 CAN-2005-0993
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1. Problem Description

Buffer overflow in nwprint allows local users to execute
arbitrary code via a long command line argument.

The Common Vulnerabilities and Exposures project (cve.mitre.org)
has assigned the name CAN-2005-0993 to this issue.

2. Vulnerable Supported Versions

System Binaries
----------------------------------------------------------------------
OpenServer 5.0.6 /usr/lib/nucrt/bin/nwprint
/usr/lib/nucrt/bin/nwlpstat
/etc/nwcleand
/usr/lib/nucrt/bin/nwcancel
/usr/lib/nucrt/bin/nwlpadmin

OpenServer 5.0.7 See the Maintenance Pack 3 Release Notes

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 Location of Fixed Binaries

ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2005.26

4.5 Verification

MD5 (VOL.000.000) = 83798688f4e5ac7f9e8c9602df8fa575

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

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://lists.seifried.org/pipermail/security/2005-April/007678.html
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0993

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 sr893493 fz531721
erg712826.

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 pasquale minervini

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