Gentoo Linux Security Advisory 201406-24 - A vulnerability in Dnsmasq can lead to a Denial of Service condition. Versions less than 2.66 are affected.
03fe3ef285b1b5d1ff8c208a973714bdf9c38116c4b573b22286d305c570965bMandriva Linux Security Advisory 2013-072 - When dnsmasq before 2.63 is used in conjunctions with certain configurations of libvirtd, network packets from prohibited networks may be sent to the dnsmasq application and processed. This can result in DNS amplification attacks for example. This update adds a new option --bind-dynamic which is immune to this problem. This update completes the fix for provided with dnsmasq-2.63. It was found that after the upstream patch for - replied to remote TCP-protocol based DNS queries (UDP protocol ones were corrected, but TCP ones not) from prohibited networks, when the --bind-dynamic option was used, - when --except-interface lo option was used dnsmasq didn't answer local or remote UDP DNS queries, but still allowed TCP protocol based DNS queries, - when --except-interface lo option was not used local / remote TCP DNS queries were also still answered by dnsmasq. This update fix these three cases.
1cd386bf36da7fa53caf08c4160adba6ddda2710da43dfc47169182527b1d65fRed Hat Security Advisory 2013-0579-01 - The rhev-hypervisor6 package provides a Red Hat Enterprise Virtualization Hypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor is a dedicated Kernel-based Virtual Machine hypervisor. It includes everything necessary to run and manage virtual machines: A subset of the Red Hat Enterprise Linux operating environment and the Red Hat Enterprise Virtualization Agent. Note: Red Hat Enterprise Virtualization Hypervisor is only available for the Intel 64 and AMD64 architectures with virtualization extensions. A flaw was found in the way the vhost kernel module handled descriptors that spanned multiple regions. A privileged guest user could use this flaw to crash the host or, potentially, escalate their privileges on the host.
07b3be05c32276a8368c1cdb50a625aa7b0ac9df2f22b1741885f260c9ffa053Red Hat Security Advisory 2013-0277-02 - The dnsmasq packages contain Dnsmasq, a lightweight DNS forwarder and DHCP 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. 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.
69f64a8faf20496d8acc9c8b3c87f09f8d380a6cb7de2df96355d561e0a0394bRed Hat Security Advisory 2013-0276-02 - The libvirt library is a C API for managing and interacting with the virtualization capabilities of Linux and other operating systems. In addition, libvirt provides tools for remote management of virtualized systems. It was discovered that libvirt made certain invalid assumptions about dnsmasq's command line options when setting up DNS masquerading for virtual machines, resulting in dnsmasq incorrectly processing network packets from network interfaces that were intended to be prohibited. This update includes the changes necessary to call dnsmasq with a new command line option, which was introduced to dnsmasq via RHSA-2013:0277.
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