ports/128998: [vuxml] document vulnerabilities in textproc/libxml2

Wed Nov 19 20:50:02 UTC 2008

>Number:         128998
>Category:       ports
>Synopsis:       [vuxml] document vulnerabilities in textproc/libxml2
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-ports-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Nov 19 20:50:01 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator:     Eygene Ryabinkin
>Release:        FreeBSD 7.1-PRERELEASE i386
>Organization:
Code Labs
>Environment:

System: FreeBSD 7.1-PRERELEASE i386

>Description:

The fix for the CVE-2008-4225 and CVE-2008-4226 was commited to the
textproc/libxml2 just an hour ago, but vulnerabilities seem to be left
undocumented.  At least I was not able to find the corresponding PR and
reporting channels are not clear from the commit comment.

>How-To-Repeat:

http://secunia.com/Advisories/32773/
http://www.freebsd.org/cgi/cvsweb.cgi/ports/textproc/libxml2/Makefile

>Fix:

The following VuXML entry should be evaluated and added:
--- vuln.xml begins here ---
  <vuln vid="unknown">
    <topic>libxml2 -- two integer overflow vulnerabilities</topic>
    <affects>
      <package>
	<name>libxml2</name>
	<range><lt>2.6.32_2</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>Secunia reports:</p>
	<blockquote cite="http://secunia.com/Advisories/32773/">
	  <p>Two vulnerabilities have been reported in Libxml2,
	  which can be exploited by malicious people to cause a
	  Denial of Service or to potentially compromise an
	  application using the library.</p>
	  <ol>
	    <li>An integer overflow error in the
	    “xmlSAX2Characters()” function can be
	    exploited to trigger a memory corruption via a specially
	    crafted XML file.  Successful exploitation may allow
	    execution of arbitrary code, but requires e.g. that the
	    user is tricked into processing an overly large XML
	    file (2GB or more).</li>
	    <li>An integer overflow error in the
	    “xmlBufferResize()” function can be exploited
	    to trigger the execution of an infinite loop.</li>
	  </ol>
	</blockquote>
      </body>
    </description>
    <references>
      <cvename>CVE-2008-4225</cvename>
      <cvename>CVE-2008-4226</cvename>
      <url>http://secunia.com/Advisories/32773/</url>
      <url>https://bugzilla.redhat.com/show_bug.cgi?id=470466</url>
      <url>https://bugzilla.redhat.com/show_bug.cgi?id=470480</url>
    </references>
    <dates>
      <discovery>2008-11-07</discovery>
    </dates>
  </vuln>
--- vuln.xml ends here ---
>Release-Note:
>Audit-Trail:
>Unformatted: