On Mon, Feb 20, 2017 at 03:40:07PM +0100, Greg Kurz wrote: > The local_open() and local_opendir() callbacks are vulnerable to symlink > attacks because they call: > > (1) open(O_NOFOLLOW) which follows symbolic links in all path elements but > the rightmost one > (2) opendir() which follows symbolic links in all path elements > > This patch converts both callbacks to use new helpers based on > openat_nofollow() to only open files and directories if they are > below the virtfs shared folder > > This partly fixes CVE-2016-9602. > > Signed-off-by: Greg Kurz <gr...@kaod.org> > --- > hw/9pfs/9p-local.c | 31 +++++++++++++++++++++---------- > hw/9pfs/9p-local.h | 20 ++++++++++++++++++++ > 2 files changed, 41 insertions(+), 10 deletions(-) > create mode 100644 hw/9pfs/9p-local.h
Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com>
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