[Full-disclosure] SCOSA-2005.47 UnixWare 7.1.3 UnixWare 7.1.4 : Lynx NNTP Buffer Overflow Vulnerability

[security@xxxxxxx]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

______________________________________________________________________________

                        SCO Security Advisory

Subject:                UnixWare 7.1.3 UnixWare 7.1.4 : Lynx NNTP Buffer 
Overflow Vulnerability
Advisory number:        SCOSA-2005.47
Issue date:             2005 November 08
Cross reference:        fz533159
                        CVE-2005-3120
______________________________________________________________________________


1. Problem Description

        Ulf Harnhammar has reported a vulnerability in Lynx, which can
        be exploited by malicious people to compromise a user's system.

        The vulnerability is caused due to a boundary error in the
        "HTrjis()" function in the handling of article headers sent from
        NNTP (Network News Transfer Protocol) servers. This can be
        exploited to cause a stack-based buffer overflow by e.g.
        tricking a user into visiting a malicious web site which
        redirects to a malicious NNTP server via the "nntp:"; URI
        handler.

        Successful exploitation allows execution of arbitrary code.

        The Common Vulnerabilities and Exposures project (cve.mitre.org)
        has assigned the name CVE-2005-3120 to this issue.


2. Vulnerable Supported Versions

        System                          Binaries
        ----------------------------------------------------------------------
        UnixWare 7.1.3                  /usr/gnu/bin/lynx
        UnixWare 7.1.4                  /usr/gnu/bin/lynx


3. Solution

        The proper solution is to install the latest packages.


4. UnixWare 7.1.3

        4.1 Location of Fixed Binaries

        ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.47


    4.2 Verification

        MD5 (p533159.image) = bc3fd8c36aea096b7ed75a2f27950b1e

        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 p533159.image to the /var/spool/pkg directory

        # pkgadd -d /var/spool/pkg/p533159.image


5. UnixWare 7.1.4

        5.1 Location of Fixed Binaries

        ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.47


    5.2 Verification

        MD5 (p533159.image) = bc3fd8c36aea096b7ed75a2f27950b1e

        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 p533159.image to the /var/spool/pkg directory

        # pkgadd -d /var/spool/pkg/p533159.image


6. References

        Specific references for this advisory:
                http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3120
                
http://lists.grok.org.uk/pipermail/full-disclosure/2005-October/038019.html
                http://securitytracker.com/id?1015065
                http://secunia.com/advisories/17216

        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 incident fz533159.


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 Ulf Harnhammar for reporting this
        vulnerability.

______________________________________________________________________________
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.2 (UnixWare)

iD8DBQFDcPYVaqoBO7ipriERAjoRAJ0U1Ik6iVjuCU2XFRAAiJ1k157D8gCeOXw6
+lnmbCl8lvRH/GYwLg2saLE=
=g4hZ
-----END PGP SIGNATURE-----
_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/