FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports Collection

nsd -- Denial of Service

Affected packages
		nsd	<	3.2.13

Details

VuXML ID	17f369dc-d7e7-11e1-90a2-000c299b62e1
Discovery	2012-07-27
Entry	2012-07-27

Tom Hendrikx reports:

It is possible to crash (SIGSEGV) a NSD child server process by sending it a DNS packet from any host on the internet and the per zone stats build option is enabled. A crashed child process will automatically be restarted by the parent process, but an attacker may keep the NSD server occupied restarting child processes by sending it a stream of such packets effectively preventing the NSD server to serve.

[source]

References

CVE Name	CVE-2012-2979
URL	http://www.nlnetlabs.nl/downloads/CVE-2012-2979.txt