UnixWare 7.1.4 UnixWare 7.1.3 : The error handling in the inflate and inflateBack functions in ZLib compression library allows local users to cause a denial of service

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Date: 10/19/04

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    To: security-announce@list.sco.com, bugtraq@securityfocus.com, full-disclosure@lists.netsys.com
    Date: Mon, 18 Oct 2004 15:57:47 -0700 (PDT)
    
    

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    ______________________________________________________________________________

                            SCO Security Advisory

    Subject: UnixWare 7.1.4 UnixWare 7.1.3 : The error handling in the inflate and inflateBack functions in ZLib compression library allows local users to cause a denial of service
    Advisory number: SCOSA-2004.17
    Issue date: 2004 October 18
    Cross reference: sr891410 fz530158 erg712692 VU#238678 CAN-2004-0797
    ______________________________________________________________________________

    1. Problem Description

            CERT Vulnerability Note VU#238678 Un-handled error conditions
            in the zlib compression library may allow an attacker to
            cause a denial-of-service condition.

            The Common Vulnerabilities and Exposures project
            (cve.mitre.org) has assigned the following name
            CAN-2004-0797 to this issue.

    2. Vulnerable Supported Versions

            System Binaries
            ----------------------------------------------------------------------
            UnixWare 7.1.4 /usr/include/zconf.h
                                            /usr/include/zlib.h
                                            /usr/lib/libz.so.1.2.1
            UnixWare 7.1.3 /usr/include/zconf.h
                                            /usr/include/zlib.h
                                            /usr/lib/libz.so.1.2.1

    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-2004.17

            4.2 Verification

            MD5 (erg712692.714.pkg) = 0b56f889838a2daaed77f8251922391e

            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 erg712692.714.pkg to the /var/spool/pkg directory

            # pkgadd -d /var/spool/pkg/erg712692.714.pkg

    5. UnixWare 7.1.3

            5.1 Location of Fixed Binaries

            ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2004.17

            5.2 Verification

            MD5 (erg712692.pkg) = 5c48d63e7f5922dccf38f6d6fa66b325

            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 erg712692.pkg to the /var/spool/pkg directory

            # pkgadd -d /var/spool/pkg/erg712692.pkg

    6. References

            Specific references for this advisory:
                    http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0797

            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 sr891410 fz530158
            erg712692.

    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. Acknowledgments

            SCO would like to thank Johan Thelmen for his help in finding
            and fixing this bug.

    ______________________________________________________________________________

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