[Full-disclosure] SCOSA-2005.43 OpenServer 6.0.0 : RPCBind Remote Denial of Service Vulnerability

[security@xxxxxxx]

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                        SCO Security Advisory

Subject:                OpenServer 6.0.0 : RPCBind Remote Denial of Service 
Vulnerability
Advisory number:        SCOSA-2005.43
Issue date:             2005 October 27
Cross reference:        sr895067 erg712957 fz533036 CAN-2005-2132
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1. Problem Description

        When the RPC portmapper (rpcbind) receives an invalid portmap
        request from a remote (or local) host, it falls into a denial
        of service state and cannot respond. As a result, the RPC
        services will not operate normally.

        The Common Vulnerabilities and Exposures project (cve.mitre.org)
        has assigned the name CAN-2005-2132 to this issue.


2. Vulnerable Supported Versions

        System                          Binaries
        ----------------------------------------------------------------------
        OpenServer 6.0.0                /usr/lib/libnsl.so.1


3. Solution

        The proper solution is to install the latest packages.


4. OpenServer 6.0.0

        4.1 Location of Fixed Binaries

        ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2005.43


    4.2 Verification

        MD5 (VOL.000.000) = 5086254532a3d202f526de0b6d343e66

        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:

        1) Download the VOL* files to a directory

        2) Run the custom command, specify an install from media
        images, and specify the directory as the location of the
        images.


5. References

        Specific references for this advisory:
                http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2132

        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 sr895067 erg712957 fz533036.


6. 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.


7. Acknowledgments

        The SCO Group would like to thank Yun Jonglim for his work
        in discovering and describing this defect so well.

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