[CVE-2010-4251/CVE-2010-4805] socket backlog handling

Andy Whitcroft apw at canonical.com
Fri Jul 22 17:42:29 UTC 2011


CVE-2010-4251
	The socket implementation in net/core/sock.c in the Linux kernel
	before 2.6.34 does not properly manage a backlog of received
	packets, which allows remote attackers to cause a denial of service
	(memory consumption) by sending a large amount of network traffic,
	as demonstrated by netperf UDP tests.

CVE-2010-4805
	The socket implementation in net/core/sock.c in the Linux kernel
	before 2.6.35 does not properly manage a backlog of received
	packets, which allows remote attackers to cause a denial of
	service by sending a large amount of network traffic, related
	to the sk_add_backlog function and the sk_rmem_alloc socket
	field. NOTE: this vulnerability exists because of an incomplete
	fix for CVE-2010-4251.

The fixes for these two CVEs have already hit most of the other branches.
Following this email is a heap of patches which are direct cherry-picks
from those that were acked and applied to the lucid master branch.

Proposing for lucid/fsl-imx51.

-apw




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