Dnsmasq: listening on all interfaces via libvirt and TCP
Synthesis of the vulnerability
When Dnsmasq is installed on a server using libvirt, Dnsmasq accepts TCP queries coming from all interfaces, so an attacker can for example create a distributed denial of service.Impacted products:
Dnsmasq, Fedora, MBS.
894486, BID-57458, CVE-2013-0198, FEDORA-2013-1320, FEDORA-2013-1357, MDVSA-2013:072, VIGILANCE-VUL-12340.
Description of the vulnerability
The VIGILANCE-VUL-11750 bulletin describes a vulnerability of Dnsmasq with libvirt, which accepts queries coming from all interfaces.
This vulnerability was corrected (VIGILANCE-SOL-26802) for DNS packets on UDP. However, an attacker can still use DNS packets on TCP.
When Dnsmasq is installed on a server using libvirt, Dnsmasq therefore accepts TCP queries coming from all interfaces, so an attacker can for example create a distributed denial of service.Complete Vigil@nce bulletin....
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