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                        SCO Security Advisory

Subject: UnixWare 7.1.1 Open UNIX 8.0.0 : rcp of /proc causes denial-of-service
Advisory number: CSSA-2002-SCO.41
Issue date: 2002 October 21
Cross reference:
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1. Problem Description

        An rcp of /proc by a normal user can cause the entire system
        to be unusable.

2. Vulnerable Supported Versions

        System Binaries
        ----------------------------------------------------------------------
        UnixWare 7.1.1 /etc/conf/pack.d/fs/Driver_atup.o
                                        /etc/conf/pack.d/fs/Driver_mp.o
        Open UNIX 8.0.0 /etc/conf/pack.d/fs/Driver_atup.o
                                        /etc/conf/pack.d/fs/Driver_mp.o

3. Solution

        The proper solution is to install the latest packages.

4. UnixWare 7.1.1

        4.1 Location of Fixed Binaries

        ftp://ftp.sco.com/pub/updates/OpenUNIX/CSSA-2002-SCO.41

        4.2 Verification

        MD5 (erg712112c.pkg.Z) = 106da290e2483bc7aba11d7f486b50c4

        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 erg712112c.pkg.Z to the /var/spool/pkg directory

        # uncompress /var/spool/pkg/erg712112c.pkg.Z
        # pkgadd -d /var/spool/pkg/erg712112c.pkg

5. Open UNIX 8.0.0

        5.1 Location of Fixed Binaries

        ftp://ftp.sco.com/pub/updates/OpenUNIX/CSSA-2002-SCO.41

        5.2 Verification

        MD5 (erg712112d.pkg.Z) = b0e485feccbbe76aefb4061f9b7e6192

        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:

        Download erg712112d.pkg.Z to the /var/spool/pkg directory

        # uncompress /var/spool/pkg/erg712112d.pkg.Z
        # pkgadd -d /var/spool/pkg/erg712112d.pkg

6. References

        Specific references for this advisory:
                http://mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1231

        SCO security resources:
                http://www.sco.com/support/security/index.html

        This security fix closes SCO incidents sr868418, fz525927,
        erg712112.

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.

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