ports/128837: [vuxml] net-mgmt/net-snmp and net-mgmt/net-snmp53: CVE-2008-4309

Thu Nov 13 11:00:12 UTC 2008

>Number:         128837
>Category:       ports
>Synopsis:       [vuxml] net-mgmt/net-snmp and net-mgmt/net-snmp53: CVE-2008-4309
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-ports-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Nov 13 11:00:11 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:

Denial of Service for the certain versions of agents from net-snmp packages.
Citing by http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4309:
-----
Integer overflow in the netsnmp_create_subtree_cache function in
agent/snmp_agent.c in net-snmp 5.4 before 5.4.2.1, 5.3 before
5.3.2.3, and 5.2 before 5.2.5.1 allows remote attackers to cause a
denial of service (crash) via a crafted SNMP GETBULK request, which
triggers a heap-based buffer overflow, related to the number of
responses or repeats.
-----

>How-To-Repeat:

Look at http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4309
and references therein.

>Fix:

The following VuXML entry for this issue should be evaluated and added:
--- vuln.xml begins here ---
  <vuln vid="">
    <topic>net-snmp -- Denial of Service for SNMP agent via crafted GETBULK request</topic>
    <affects>
      <package>
	<name>net-snmp</name>
	<range><lt>5.4.2.1</lt></range>
      </package>
      <package>
	<name>net-snmp53</name>
	<range><lt>5.3.2.3</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>Wes Hardaker reports through sourceforge.net forum:</p>
	<blockquote cite="http://sourceforge.net/forum/forum.php?forum_id=882903">
	  <p>SECURITY ISSUE: A bug in the getbulk handling code could
	  let anyone with even minimal access crash the agent. If you
	  have open access to your snmp agents (bad bad bad; stop doing
	  that!) or if you don't trust everyone that does have access to
	  your agents you should updated immediately to prevent
	  potential denial of service attacks.</p>
	</blockquote>
	<p>Description at cve.mitre.org additionally clarifies:</p>
	<blockquote cite="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4309">
	  <p>Integer overflow in the netsnmp_create_subtree_cache
	  function in agent/snmp_agent.c in net-snmp 5.4 before
	  5.4.2.1, 5.3 before 5.3.2.3, and 5.2 before 5.2.5.1 allows
	  remote attackers to cause a denial of service (crash) via
	  a crafted SNMP GETBULK request, which triggers a heap-based
	  buffer overflow, related to the number of responses or
	  repeats.</p>
	</blockquote>
      </body>
    </description>
    <references>
      <cvename>CVE-2008-4309</cvename>
      <url>http://sourceforge.net/forum/forum.php?forum_id=882903</url>
      <url>http://www.openwall.com/lists/oss-security/2008/10/31/1</url>
      <url>http://net-snmp.svn.sourceforge.net/viewvc/net-snmp/tags/Ext-5-2-5-1/net-snmp/agent/snmp_agent.c?r1=17271&r2=17272&pathrev=17272</url>
    </references>
    <dates>
      <discovery>2008-10-31</discovery>
    </dates>
  </vuln>
--- vuln.xml ends here ---

Additionally, it will be very interesting if net-mgmt/net-snmp4 is
vulnerable.  I assume that 5.x was grown from the UCD's implementation,
so it can share the common code.  Currently I have no time to look at
this, but if I'll do it, will report as the followup.
>Release-Note:
>Audit-Trail:
>Unformatted: