Bug 264436 (CVE-2009-1072)

Summary:	Kernel: <2.6.28.9 nfsd does not drop CAP_MKNOD (CVE-2009-1072)
Product:	Gentoo Security	Reporter:	Stefan Behte (RETIRED) <craig>
Component:	Kernel	Assignee:	Gentoo Security <security>
Status:	RESOLVED FIXED
Severity:	normal	CC:	hardened-kernel+disabled, kernel
Priority:	High
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=76a67ec6fb79ff3570dcb5342142c16098299911
Whiteboard:	[linux <2.6.27.21] [linux >=2.6.28 <2.6.28.9]
Package list:		Runtime testing required:	---

Description Stefan Behte (RETIRED) gentoo-dev

2009-03-31 20:32:41 UTC

CVE-2009-1072 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-1072):
  nfsd in the Linux kernel before 2.6.28.9 does not drop the CAP_MKNOD
  capability before handling a user request in a thread, which allows
  local users to create device nodes, as demonstrated on a filesystem
  that has been exported with the root_squash option.