Security Update: [CSSA-2001-SCO.17] OpenServer: vi /tmp vulnerability

[sco-security () caldera com]

To: bugtraq () securityfocus com security-announce () lists securityportal com announce () lists caldera com

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            Caldera International, Inc. Security Advisory

Subject:                OpenServer: vi /tmp vulnerability
Advisory number:        CSSA-2001-SCO.17
Issue date:             2001 September 19
Cross reference:
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1. Problem Description
        
        The vi editor uses temporary names that are predictable. A
        user could use this vulnerability to write arbitrary files.


2. Vulnerable Versions

        Operating System        Version         Affected Files
        ------------------------------------------------------------------
        OpenServer              All             /usr/bin/{ex,vi,edit,vedit,view} 
                                                /usr/lib/expreserve
                                                /usr/lib/exrecover

3. Workaround

        None.


4. OpenServer

  4.1 Location of Fixed Binaries

        ftp://stage.caldera.com/pub/security/openserver/CSSA-2001-SCO.17/


  4.2 Verification

        md5 checksums:

        e82e73b8fa21426c19d82fb9cd2988e1        usr.bin.vi.tar.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:

        # cp /usr/bin/ex /usr/bin/ex-
        # cp /usr/lib/expreserve /usr/lib/expreserve-
        # cp /usr/lib/exrecover /usr/lib/exrecover-
        # uncompress /tmp/usr.bin.vi.tar.Z
        # cd /
        # tar xvf /tmp/usr.bin.vi.tar


5. References

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

        This advisory addresses Caldera Security internal incident
        sr847935.

7. 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.


8. Acknowledgements

        Caldera International wishes to thank KF <dotslash () snosoft com>
        for discovering and reporting this problem.

         
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