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Gentoo Linux Security Advisory GLSA 200801-16 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: MaraDNS: CNAME Denial of Service |
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Date: January 29, 2008 |
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Bugs: #204351 |
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ID: 200801-16 |
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Synopsis |
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======== |
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|
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MaraDNS is prone to a Denial of Service vulnerability impacting CNAME |
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resolution. |
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Background |
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========== |
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|
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MaraDNS is a package that implements the Domain Name Service (DNS) with |
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resolver and caching ability. |
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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/maradns < 1.2.12.08 >= 1.2.12.08 |
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Description |
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=========== |
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|
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Michael Krieger reported that a specially crafted DNS could prevent an |
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authoritative canonical name (CNAME) record from being resolved because |
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of an "improper rotation of resource records". |
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|
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Impact |
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====== |
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|
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A remote attacker could send specially crafted DNS packets to a |
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vulnerable server, making it unable to resolve CNAME records. |
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Workaround |
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========== |
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Add "max_ar_chain = 2" to the "marac" configuration file. |
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Resolution |
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========== |
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All MaraDNS users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=net-dns/maradns-1.2.12.09" |
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|
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References |
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========== |
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[ 1 ] CVE-2008-0061 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0061 |
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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-200801-16.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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|
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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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