[Full-disclosure] SCOSA-2005.58 UnixWare 7.1.4 : Gzip Multiple Vulnerabilities

[security@xxxxxxx]

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                        SCO Security Advisory

Subject:                UnixWare 7.1.4 : Gzip Multiple Vulnerabilities
Advisory number:        SCOSA-2005.58
Issue date:             2005 December 16
Cross reference:        sr894862 erg712915 fz532919
                        CVE-2005-0758 CVE-2005-0988 CVE-2005-1228
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1. Problem Description

        zgrep in gzip does not properly sanitize arguments, which allows
        local users to execute arbitrary commands via filenames that are
        injected into a sed script.

        The Common Vulnerabilities and Exposures project (cve.mitre.org)
        has assigned the name CVE-2005-0758 to this issue.

        Race condition in gzip, when decompressing a gzipped file,
        allows local users to modify permissions of arbitrary files via
        a hard link attack on a file while it is being decompressed,
        whose permissions are changed by gzip after the decompression is
        complete.

        The Common Vulnerabilities and Exposures project (cve.mitre.org)
        has assigned the name CVE-2005-0988 to this issue.

        Directory traversal vulnerability in gunzip -N allows remote
        attackers to write to arbitrary directories via a .. (dot dot)
        in the original filename within a compressed file.

        The Common Vulnerabilities and Exposures project (cve.mitre.org)
        has assigned the name CVE-2005-1228 to this issue.


2. Vulnerable Supported Versions

        System                          Binaries
        ----------------------------------------------------------------------
        UnixWare 7.1.4                  gzip distribution


3. Solution

        The proper solution is to install the latest packages.


4. UnixWare 7.1.4

        4.1 Location of Fixed Binaries

        ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.58


    4.2 Verification

        MD5 (gzip.image) = 82e72a751b0cfee5e7e51680052d2651

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

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


5. References

        Specific references for this advisory:
                http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-0758
                http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-0988
                http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-1228
                http://secunia.com/advisories/15047
                http://www.securityfocus.com/bid/12996
                http://xforce.iss.net/xforce/xfdb/20199

        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 sr894862 erg712915
        fz532919.


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.

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