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Gentoo Linux Security Advisory GLSA 200809-02 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: dnsmasq: Denial of Service and DNS spoofing |
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Date: September 04, 2008 |
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Bugs: #231282, #232523 |
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ID: 200809-02 |
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Synopsis |
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======== |
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|
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Two vulnerabilities in dnsmasq might allow for a Denial of Service or |
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spoofing of DNS replies. |
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Background |
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========== |
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|
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Dnsmasq is a lightweight and easily-configurable DNS forwarder and DHCP |
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server. |
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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/dnsmasq < 2.45 >= 2.45 |
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Description |
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=========== |
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|
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* Dan Kaminsky of IOActive reported that dnsmasq does not randomize |
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UDP source ports when forwarding DNS queries to a recursing DNS |
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server (CVE-2008-1447). |
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|
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* Carlos Carvalho reported that dnsmasq in the 2.43 version does not |
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properly handle clients sending inform or renewal queries for unknown |
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DHCP leases, leading to a crash (CVE-2008-3350). |
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Impact |
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====== |
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|
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A remote attacker could send spoofed DNS response traffic to dnsmasq, |
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possibly involving generating queries via multiple vectors, and spoof |
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DNS replies, which could e.g. lead to the redirection of web or mail |
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traffic to malicious sites. Furthermore, an attacker could generate |
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invalid DHCP traffic and cause a Denial of Service. |
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|
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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 dnsmasq users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=net-dns/dnsmasq-2.45" |
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References |
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========== |
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[ 1 ] CVE-2008-3350 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3350 |
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[ 2 ] CVE-2008-1447 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1447 |
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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-200809-02.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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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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http://creativecommons.org/licenses/by-sa/2.5 |
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