[Full-Disclosure] OpenServer 5.0.6 OpenServer 5.0.7 : Multiple Vulnerabilities in Sendmail

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                        SCO Security Advisory

Subject:                OpenServer 5.0.6 OpenServer 5.0.7 : Multiple 
Vulnerabilities in Sendmail
Advisory number:        SCOSA-2004.11
Issue date:             2004 July 28
Cross reference:        sr876461 fz527630 erg712277 CAN-2003-0161 CA-2003-12 
                        sr884730 fz528323 erg712435 CAN-2003-0694 CA-2003-25
______________________________________________________________________________


1. Problem Description

        CERT Advisory CA-2003-12 

        There is a vulnerability in sendmail that can be exploited 
        to cause a denial-of-service condition and could allow a 
        remote attacker to execute arbitrary code with the privileges 
        of the sendmail daemon, typically root.

        The Common Vulnerabilities and Exposures project (cve.mitre.org)
        has assigned the name CAN-2003-0161 to this issue.

        CERT Advisory CA-2003-25

        The prescan function in Sendmail 8.12.9 allows remote attackers 
        to execute arbitrary code via buffer overflow attacks, as 
        demonstrated using the parseaddr function in parseaddr.c.

        The Common Vulnerabilities and Exposures project (cve.mitre.org)
        has assigned the name CAN-2003-0694 to this issue.

2. Vulnerable Supported Versions

        System                          Binaries
        ----------------------------------------------------------------------
        OpenServer 5.0.6                Sendmail distribution
        OpenServer 5.0.7                Sendmail distribution   

3. Solution

        The proper solution is to install the latest packages.


4. OpenServer 5.0.6

        4.1  First install OSS646B or later - Execution Environment Supplement

        ftp://ftp.sco.com/pub/openserver5/oss646b

        4.2 Location of Fixed Binaries

        ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2004.11

        4.3 Verification

        MD5 (VOL.000.000) = ff18b1666956ea57c9d54008c6ee9444

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

        4.4 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. OpenServer 5.0.7

        5.1 Location of Fixed Binaries

        ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2004.11

        The fixes are also available in SCO OpenServer Release 5.0.7 
        Maintenance Pack 3 or later.  See
        http://www.sco.com/support/update/download/osr507list.html.

        5.2 Verification

        MD5 (VOL.000.000)    = ff18b1666956ea57c9d54008c6ee9444

        MD5 (507mp3_vol.tar) = c927aefdd50b50aca5d29e08c1562aec

        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:

        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.

        Or see the Maintenance Pack 3 Release and Installation Notes at

        ftp://ftp.sco.com/pub/openserver5/507/mp/mp3/osr507mp3.txt


6. References

        Specific references for this advisory:
                http://www.cert.org/advisories/CA-2003-12.html 
                http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0161 
                http://www.kb.cert.org/vuls/id/897604
                http://www.cert.org/advisories/CA-2003-25.html
                http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0694
                http://www.kb.cert.org/vuls/id/784980

        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 sr876461 fz527630
        erg712277 sr884730 fz528323 erg712435.


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

        Michal Zalewski <lcamtuf@xxxxxxxxxxx> discovered and
        researched these issues. Thanks to Eric Allman, Claus 
        Assmann, Greg Shapiro, and Dave Anderson of Sendmail

______________________________________________________________________________

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