______________________________________________________________________________ 


                Caldera International, Inc. Security Advisory 


Subject: OpenServer 5.0.5 OpenServer 5.0.6 : popper buffer overflow and
denial-of-service 
Advisory number: CSSA-2002-SCO.20 
Issue date: 2002 May 22 
Cross reference: 
______________________________________________________________________________ 



1. Problem Description 


        /etc/popper will go into a loop if a character string of 
        length 2048 (or more) is sent to it. 


        If the bulldir variable in the user's config file is longer 
        than 256 characters, popper will memory fault. 



2. Vulnerable Supported Versions 


        System Binaries 
        ---------------------------------------------------------------------- 
        OpenServer 5.0.5 /etc/popper 
        OpenServer 5.0.6 /etc/popper 



3. Solution 


        The proper solution is to install the latest packages. 



4. OpenServer 5.0.5 


        4.1 Location of Fixed Binaries 


        ftp://stage.caldera.com/pub/security/openserver/CSSA-2002-SCO.20 



        4.2 Verification 


        MD5 (VOL.000.000) = f2746cddde194cb93e5ad1b41637a75c 


        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: 


        1) Download the VOL* files to the /tmp directory 


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



5. OpenServer 5.0.6 


        5.1 Location of Fixed Binaries 


        ftp://stage.caldera.com/pub/security/openserver/CSSA-2002-SCO.20 



        5.2 Verification 


        MD5 (VOL.000.000) = f2746cddde194cb93e5ad1b41637a75c 


        md5 is available for download from 
                ftp://stage.caldera.com/pub/security/tools/ 



        5.3 Installing Fixed Binaries 


        Upgrade the affected binaries with the following commands: 


        1) Download the VOL* files to the /tmp directory 


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



6. References 


        Specific references for this advisory: 
                none 


        Caldera UNIX security resources: 
                http://stage.caldera.com/support/security/ 


        Caldera OpenLinux security resources: 
                http://www.caldera.com/support/security/index.html 


        This security fix closes Caldera incidents sr863699, fz520822, 
        erg712033. 



7. Disclaimer 


        Caldera International, Inc. 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 Caldera products. 



8. Acknowledgements 


        Marcell Fodor reported the memory fault issue. Dustin Childers 
        reported the denial-of-service issue. 


______________________________________________________________________________ 



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