| <?xml version="1.0" encoding="utf-8"?> |
| <!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> |
| |
| <glsa id="200609-11"> |
| <title>BIND: Denial of Service</title> |
| <synopsis> |
| ISC BIND contains two vulnerabilities allowing a Denial of Service under |
| certain conditions. |
| </synopsis> |
| <product type="ebuild">bind</product> |
| <announced>September 15, 2006</announced> |
| <revised>September 15, 2006: 01</revised> |
| <bug>146486</bug> |
| <access>remote</access> |
| <affected> |
| <package name="net-dns/bind" auto="yes" arch="*"> |
| <unaffected range="ge">9.3.2-r4</unaffected> |
| <unaffected range="rge">9.2.6-r4</unaffected> |
| <vulnerable range="lt">9.3.2-r4</vulnerable> |
| </package> |
| </affected> |
| <background> |
| <p> |
| ISC BIND is the Internet Systems Consortium implementation of the |
| Domain Name System (DNS) protocol. |
| </p> |
| </background> |
| <description> |
| <p> |
| Queries for SIG records will cause an assertion error if more than one |
| SIG RRset is returned. Additionally, an INSIST failure can be triggered |
| by sending multiple recursive queries if the response to the query |
| arrives after all the clients looking for the response have left the |
| recursion queue. |
| </p> |
| </description> |
| <impact type="normal"> |
| <p> |
| An attacker having access to a recursive server can crash the server by |
| querying the SIG records where there are multiple SIG RRsets, or by |
| sending many recursive queries in a short time. The exposure can be |
| lowered by restricting the clients that can ask for recursion. An |
| attacker can also crash an authoritative server serving a DNSSEC zone |
| in which there are multiple SIG RRsets. |
| </p> |
| </impact> |
| <workaround> |
| <p> |
| There are no known workarounds at this time. |
| </p> |
| </workaround> |
| <resolution> |
| <p> |
| All BIND 9.3 users should update to the latest version: |
| </p> |
| <code> |
| # emerge --sync |
| # emerge --ask --oneshot --verbose ">=net-dns/bind-9.3.2-r4"</code> |
| <p> |
| All BIND 9.2 users should update to the latest version: |
| </p> |
| <code> |
| # emerge --sync |
| # emerge --ask --oneshot --verbose ">=net-dns/bind-9.2.6-r4"</code> |
| </resolution> |
| <references> |
| <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4095">CVE-2006-4095</uri> |
| <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4096">CVE-2006-4096</uri> |
| </references> |
| <metadata tag="requester" timestamp="Wed, 06 Sep 2006 10:13:53 +0000"> |
| falco |
| </metadata> |
| <metadata tag="submitter" timestamp="Thu, 07 Sep 2006 11:28:27 +0000"> |
| falco |
| </metadata> |
| <metadata tag="bugReady" timestamp="Thu, 14 Sep 2006 22:49:56 +0000"> |
| jaervosz |
| </metadata> |
| </glsa> |