CentOS Update for dnsmasq CESA-2013:0277 centos6

Published: 2013-03-12 04:29:32
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:P

Summary:
The remote host is missing an update for the 'dnsmasq' Linux Distribution Package(s) announced via the referenced advisory.

Affected Versions:
dnsmasq on CentOS 6

Recommendations:
Please install the updated Linux Distribution Packages.

Technical Details:
The dnsmasq Linux Distribution 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 Linux Distribution Package users are advised to install updated libvirt Linux Distribution 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.

Detection Type:
Linux Distribution Package

Solution Type:
Vendor Patch

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2012-3411

References:

http://lists.centos.org/pipermail/centos-announce/2013-March/019317.html

Severity
Medium
CVSS Score
5.0
Published
2013-03-12
Modified
2019-03-15
Category
CentOS Local Security Checks

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