Security Update: [CSSA-2001-SCO.39] Open UNIX, UnixWare 7: timed does not enforce nulls

To: [email protected] [email protected]
[email protected]

        Caldera International, Inc. Security Advisory

Subject: Open UNIX, UnixWare 7: timed does not enforce nulls
Advisory number: CSSA-2001-SCO.39
Issue date: 2001 December 10
Cross reference:

1. Problem Description

    The timed program does not enforce null-termination of strings
    in certain situations. It is possible that this could be used
    by a malicious user to perform a remote denial-of-service
    attack.
   

2. Vulnerable Versions

    Operating System        Version         Affected Files
    ------------------------------------------------------------------
    UnixWare 7              All             /usr/sbin/in.timed
    Open UNIX               8.0.0           /usr/sbin/in.timed
   

3. Workaround

    If the in.timed service is not needed, it may be disabled.
   

4. UnixWare 7, Open UNIX 8

4.1 Location of Fixed Binaries

    ftp://stage.caldera.com/pub/security/openunix/CSSA-2001-SCO.39/

4.2 Verification

    md5 checksums:
    
    87c68b618f4317dd92460aaa49e6a522        erg711890.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/erg711890.Z
    # pkgadd -d /tmp/erg711890

5. References

    http://xforce.iss.net/static/6228.php
    http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2001-0388
   
    This and other advisories are located at
            http://stage.caldera.com/support/security
   
    This advisory addresses Caldera Security internal incidents
    sr855196, fz519311, erg711890.
   

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.
   

7. Acknowledgements

    This vulnerability was discovered and researched by David A.
    Holland <[email protected]>.