Security Update: [CSSA-2002-SCO.38] Open UNIX 8.0.0 UnixWare 7.1.1 : X server insecure popen and buffer overflow

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                        SCO Security Advisory

Subject:                Open UNIX 8.0.0 UnixWare 7.1.1 : X server insecure popen and buffer overflow
Advisory number:        CSSA-2002-SCO.38
Issue date:             2002 August 26
Cross reference:
______________________________________________________________________________


1. Problem Description

        The X server did not drop privilege before invoking xkbcomp
        or other external commands. In addition, there was a buffer
        overflow in the same area of the code.


2. Vulnerable Supported Versions

        System                          Binaries
        ----------------------------------------------------------------------
        Open UNIX 8.0.0                 /usr/X/bin/Xsco
        UnixWare 7.1.1                  /usr/X/bin/Xsco


3. Solution

        The proper solution is to install the latest packages.


4. Open UNIX 8.0.0

        4.1 Location of Fixed Binaries

        ftp://ftp.sco.com/pub/updates/OpenUNIX/CSSA-2002-SCO.38


        4.2 Verification

        MD5 (erg711819b.pkg.Z) = 8c06d16b46b7895c545bcdb7c23475d0

        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 commands:

        Download erg711819b.pkg.Z to the /var/spool/pkg directory

        # uncompress /var/spool/pkg/erg711819b.pkg.Z
        # pkgadd -d /var/spool/pkg/erg711819b.pkg


5. UnixWare 7.1.1

        5.1 Location of Fixed Binaries

        ftp://ftp.sco.com/pub/updates/OpenUNIX/CSSA-2002-SCO.38


        5.2 Verification

        MD5 (erg711819b.pkg.Z) = 8c06d16b46b7895c545bcdb7c23475d0

        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 commands:

        Download erg711819b.pkg.Z to the /var/spool/pkg directory

        # uncompress /var/spool/pkg/erg711819b.pkg.Z
        # pkgadd -d /var/spool/pkg/erg711819b.pkg


6. References

        Specific references for this advisory:
                http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0987
                http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0988
                http://marc.theaimsgroup.com/?l=bugtraq&m=88653528226228&w=2

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

        This security fix closes SCO incidents sr850806, fz518676,
        erg711819.


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. Acknowledgements

        This vulnerability was discovered and researched by Olaf
        Kirch (okir () suse de).

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