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<?xml version="1.0" encoding="utf-8"?>
<glsa id="200804-22">
<title>PowerDNS Recursor: DNS Cache Poisoning</title>
Use of insufficient randomness in PowerDNS Recursor might lead to DNS cache
<product type="ebuild">pdns-recursor</product>
<announced>April 18, 2008</announced>
<revised>August 21, 2008: 03</revised>
<package name="net-dns/pdns-recursor" auto="yes" arch="*">
<unaffected range="ge">3.1.6</unaffected>
<vulnerable range="lt">3.1.6</vulnerable>
The PowerDNS Recursor is an advanced recursing nameserver.
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
<impact type="normal">
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.
There is no known workaround at this time.
All PowerDNS Recursor users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=net-dns/pdns-recursor-3.1.6&quot;</code>
<uri link="">CVE-2008-1637</uri>
<uri link="">CVE-2008-3217</uri>
<metadata tag="requester" timestamp="Thu, 17 Apr 2008 20:12:08 +0000">
<metadata tag="submitter" timestamp="Fri, 18 Apr 2008 01:27:35 +0000">
<metadata tag="bugReady" timestamp="Fri, 18 Apr 2008 01:27:43 +0000">