| <?xml version="1.0" encoding="utf-8"?> |
| <!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> |
| |
| <glsa id="200804-22"> |
| <title>PowerDNS Recursor: DNS Cache Poisoning</title> |
| <synopsis> |
| Use of insufficient randomness in PowerDNS Recursor might lead to DNS cache |
| poisoning. |
| </synopsis> |
| <product type="ebuild">pdns-recursor</product> |
| <announced>April 18, 2008</announced> |
| <revised>August 21, 2008: 03</revised> |
| <bug>215567</bug> |
| <bug>231335</bug> |
| <access>remote</access> |
| <affected> |
| <package name="net-dns/pdns-recursor" auto="yes" arch="*"> |
| <unaffected range="ge">3.1.6</unaffected> |
| <vulnerable range="lt">3.1.6</vulnerable> |
| </package> |
| </affected> |
| <background> |
| <p> |
| The PowerDNS Recursor is an advanced recursing nameserver. |
| </p> |
| </background> |
| <description> |
| <p> |
| Amit Klein of Trusteer reported that insufficient randomness is used to |
| calculate the TRXID values and the UDP source port numbers |
| (CVE-2008-1637). Thomas Biege of SUSE pointed out that a prior fix to |
| resolve this issue was incomplete, as it did not always enable the |
| stronger random number generator for source port selection |
| (CVE-2008-3217). |
| </p> |
| </description> |
| <impact type="normal"> |
| <p> |
| A remote attacker could send malicious answers to insert arbitrary DNS |
| data into the cache. These attacks would in turn help an attacker to |
| perform man-in-the-middle and site impersonation attacks. |
| </p> |
| </impact> |
| <workaround> |
| <p> |
| There is no known workaround at this time. |
| </p> |
| </workaround> |
| <resolution> |
| <p> |
| All PowerDNS Recursor users should upgrade to the latest version: |
| </p> |
| <code> |
| # emerge --sync |
| # emerge --ask --oneshot --verbose ">=net-dns/pdns-recursor-3.1.6"</code> |
| </resolution> |
| <references> |
| <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1637">CVE-2008-1637</uri> |
| <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3217">CVE-2008-3217</uri> |
| </references> |
| <metadata tag="requester" timestamp="Thu, 17 Apr 2008 20:12:08 +0000"> |
| keytoaster |
| </metadata> |
| <metadata tag="submitter" timestamp="Fri, 18 Apr 2008 01:27:35 +0000"> |
| rbu |
| </metadata> |
| <metadata tag="bugReady" timestamp="Fri, 18 Apr 2008 01:27:43 +0000"> |
| rbu |
| </metadata> |
| </glsa> |