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            Caldera International, Inc. Security Advisory

Subject: Open UNIX, UnixWare 7: buffer overflow in ppp utilities
Advisory number: CSSA-2001-SCO.32
Issue date: 2001 November 12
Cross reference:
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1. Problem Description
        
        There is a buffer overflow in several of the ppp utilities that
        are linked to /usr/bin/pppattach. This could be used by an
        unauthorized user to gain privilege.

2. Vulnerable Versions

        Operating System Version Affected Files
        ------------------------------------------------------------------
        UnixWare 7 7.1.0, 7.1.1 /usr/bin/pppattach
        Open UNIX 8.0.0 /usr/bin/pppattach

3. Workaround

        If you do not use ppp, remove the execute and/or setuid
        permissions from /usr/bin/pppattach.

4. UnixWare 7, Open UNIX 8

  4.1 Location of Fixed Binaries

        ftp://stage.caldera.com/pub/security/openunix/CSSA-2001-SCO.32/

  4.2 Verification

        md5 checksums:
        
        24cf948a3691be14398dcd63d2f8eafb erg711869b.Z

        md5 is available for download from

                ftp://stage.caldera.com/pub/security/tools/

  4.3 Installing Fixed Binaries

        Upgrade the affected binaries with the following commands:

        # uncompress /tmp/erg711869b.Z
        # pkgadd -d /tmp/erg711869b

5. References

        This and other advisories are located at
                http://stage.caldera.com/support/security

        This advisory addresses Caldera Security internal incidents
        sr854234, fz519119 and erg711869.

6. Disclaimer

        Caldera International, Inc. is not responsible for the misuse
        of any of the information we provide on our website and/or
        through our security advisories. Our advisories are a service
        to our customers intended to promote secure installation and
        use of Caldera International products.

         
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