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Gentoo Linux Security Advisory GLSA 200804-22 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: PowerDNS Recursor: DNS Cache Poisoning |
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Date: April 18, 2008 |
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Bugs: #215567 |
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ID: 200804-22 |
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Synopsis |
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======== |
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|
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Use of insufficient randomness in PowerDNS Recursor might lead to DNS |
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cache poisoning. |
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Background |
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========== |
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|
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The PowerDNS Recursor is an advanced recursing nameserver. |
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|
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 net-dns/pdns-recursor < 3.1.5 >= 3.1.5 |
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|
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Description |
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=========== |
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|
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Amit Klein of Trusteer reported that insufficient randomness is used to |
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calculate the TRXID values and the UDP source port numbers. |
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Impact |
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====== |
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|
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A remote attacker could send malicious answers to insert arbitrary DNS |
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data into the cache. These attacks would in turn help an attacker to |
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perform man-in-the-middle and site impersonation attacks. |
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Workaround |
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========== |
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There is no known workaround at this time. |
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Resolution |
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========== |
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All PowerDNS Recursor users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=net-dns/pdns-recursor-3.1.5" |
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|
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References |
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========== |
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[ 1 ] CVE-2008-1637 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1637 |
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Availability |
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============ |
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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http://security.gentoo.org/glsa/glsa-200804-22.xml |
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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http://bugs.gentoo.org. |
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|
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License |
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======= |
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Copyright 2008 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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|
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http://creativecommons.org/licenses/by-sa/2.5 |
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