ID de Prueba:	1.3.6.1.4.1.25623.1.0.881645
Categoría:	CentOS Local Security Checks
Título:	CentOS Update for dnsmasq CESA-2013:0277 centos6
Resumen:	The remote host is missing an update for the 'dnsmasq'; package(s) announced via the referenced advisory.
Descripción:	Summary: The remote host is missing an update for the 'dnsmasq' package(s) announced via the referenced advisory. Vulnerability Insight: The dnsmasq packages contain Dnsmasq, a lightweight DNS (Domain Name Server) forwarder and DHCP (Dynamic Host Configuration Protocol) server. It was discovered that dnsmasq, when used in combination with certain libvirtd configurations, could incorrectly process network packets from network interfaces that were intended to be prohibited. A remote, unauthenticated attacker could exploit this flaw to cause a denial of service via DNS amplification attacks. (CVE-2012-3411) In order to fully address this issue, libvirt package users are advised to install updated libvirt packages. Refer to RHSA-2013:0276 for additional information. This update also fixes the following bug: * Due to a regression, the lease change script was disabled. Consequently, the 'dhcp-script' option in the /etc/dnsmasq.conf configuration file did not work. This update corrects the problem and the 'dhcp-script' option now works as expected. (BZ#815819) This update also adds the following enhancements: * Prior to this update, dnsmasq did not validate that the tftp directory given actually existed and was a directory. Consequently, configuration errors were not immediately reported on startup. This update improves the code to validate the tftp root directory option. As a result, fault finding is simplified especially when dnsmasq is called by external processes such as libvirt. (BZ#824214) * When two or more dnsmasq processes were running with DHCP enabled on one interface, DHCP RELEASE packets were sometimes lost. Consequently, when two or more dnsmasq processes were running with DHCP enabled on one interface, releasing IP addresses sometimes failed. This ... Description truncated, please see the referenced URL(s) for more information. Affected Software/OS: dnsmasq on CentOS 6 Solution: Please install the updated packages. CVSS Score: 5.0 CVSS Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
Referencia Cruzada:	Common Vulnerability Exposure (CVE) ID: CVE-2012-3411 54353 http://www.securityfocus.com/bid/54353 MDVSA-2013:072 http://www.mandriva.com/security/advisories?name=MDVSA-2013:072 RHSA-2013:0276 http://rhn.redhat.com/errata/RHSA-2013-0276.html RHSA-2013:0277 http://rhn.redhat.com/errata/RHSA-2013-0277.html RHSA-2013:0579 http://rhn.redhat.com/errata/RHSA-2013-0579.html [oss-security] 20120712 Re: Re: CVE Request -- dnsmasq: When being run by libvirt open DNS proxy (reachable out-of the virtual network set for the particular guest domain too) is created http://www.openwall.com/lists/oss-security/2012/07/12/5 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=683372 http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commitdiff%3Bh=2f38141f434e23292f84cefc33e8de76fb856147 http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commitdiff%3Bh=54dd393f3938fc0c19088fbd319b95e37d81a2b0 http://www.thekelleys.org.uk/dnsmasq/CHANGELOG https://bugzilla.redhat.com/show_bug.cgi?id=833033
Copyright	Copyright (C) 2013 Greenbone AG

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