[patch 19/19] setting ACLs on readonly mounted NFS filesystems (CVE-2005-3623)
From: Greg Kroah-Hartman
Date: Fri Dec 23 2005 - 17:49:12 EST
-stable review patch. If anyone has any objections, please let us know.
------------------
From: Andreas Gruenbacher <agruen@xxxxxxx>
We must check for MAY_SATTR before setting acls, which includes
checking for read-only exports: the lower-level setxattr operation
that eventually sets the acl cannot check export-level restrictions.
Bug reported by Martin Walter <mawa@xxxxxxxxxxxxxxx>.
Signed-off-by: Andreas Gruenbacher <agruen@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
fs/nfsd/nfs2acl.c | 2 +-
fs/nfsd/nfs3acl.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
--- linux-2.6.14.4.orig/fs/nfsd/nfs2acl.c
+++ linux-2.6.14.4/fs/nfsd/nfs2acl.c
@@ -107,7 +107,7 @@ static int nfsacld_proc_setacl(struct sv
dprintk("nfsd: SETACL(2acl) %s\n", SVCFH_fmt(&argp->fh));
fh = fh_copy(&resp->fh, &argp->fh);
- nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_NOP);
+ nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_SATTR);
if (!nfserr) {
nfserr = nfserrno( nfsd_set_posix_acl(
--- linux-2.6.14.4.orig/fs/nfsd/nfs3acl.c
+++ linux-2.6.14.4/fs/nfsd/nfs3acl.c
@@ -101,7 +101,7 @@ static int nfsd3_proc_setacl(struct svc_
int nfserr = 0;
fh = fh_copy(&resp->fh, &argp->fh);
- nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_NOP);
+ nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_SATTR);
if (!nfserr) {
nfserr = nfserrno( nfsd_set_posix_acl(
--
-
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