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SCO Security Advisory

Subject: UnixWare 7.1.4 : cdrecord local root exploit
Advisory number: SCOSA-2005.20
Issue date: 2005 April 07
Cross reference: sr891408 fz530156 erg712690 CAN-2004-0806
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1. Problem Description

cdrecord in the cdrtools package before 2.01, when installed
setuid root, does not properly drop privileges before
executing a program specified in the RSH environment variable,
which allows local users to gain privileges.

The Common Vulnerabilities and Exposures project (cve.mitre.org)
has assigned the name CAN-2004-0806 to this issue.

2. Vulnerable Supported Versions

System Binaries
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UnixWare 7.1.4 cdrtools distribution

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-2005.20

4.2 Verification

MD5 (cdrtools.pkg) = 5921506ffd8ff63a0207d946912f2493

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

4.3 Installing Fixed Binaries

Upgrade the affected binaries with the following sequence:

Download cdrtools.pkg to the /var/spool/pkg directory

# pkgadd -d /var/spool/pkg/cdrtools.pkg

5. References

Specific references for this advisory:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0806

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 sr891408 fz530156
erg712690.

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

SCO would like to thank Max Vozeler

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