Bug 313327 (CVE-2007-6733)

Summary:	Kernel: nfs_lock() POSIX lock privilege escalation (CVE-2007-6733)
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:	https://bugzilla.redhat.com/show_bug.cgi?id=570863
Whiteboard:	[ linux <= 2.6.9 ]
Package list:		Runtime testing required:	---

Description Stefan Behte (RETIRED) gentoo-dev

2010-04-06 03:04:45 UTC

CVE-2007-6733 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2007-6733):
  The nfs_lock function in fs/nfs/file.c in the Linux kernel 2.6.9 does
  not properly remove POSIX locks on files that are setgid without
  group-execute permission, which allows local users to cause a denial
  of service (BUG and system crash) by locking a file on an NFS
  filesystem and then changing this file's permissions, a related issue
  to CVE-2010-0727.