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Only sm and sm.bak need to be accessible by

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statd or sm-notify after they drop privs.
  Providing they get created, the parent
- 0007-statd-user-from-sm
  Change rpc.statd and sm-notify to take uid from the sm
  directory.

OBS-URL: https://build.opensuse.org/package/show/Base:System/nfs-utils?expand=0&rev=207
This commit is contained in:
Neil Brown 2019-09-17 01:17:20 +00:00 committed by Git OBS Bridge
parent 2c42cd5b0d
commit 0138b6c771
4 changed files with 66 additions and 6 deletions
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9
0006-nfs.conf-silence-include-error.patch
View File

@ -1,3 +1,12 @@
config: silence include error.
Including a non-existant file should not be an
error, and should not create a message.
We include /etc/nfs.conf.local just incase some
localization has been requested.
Signed-off-by: NeilBrown <neilb@suse.com>
---
support/nfs/conffile.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

45
0007-statd-user-from-sm Normal file
View File

@ -0,0 +1,45 @@
statd: take user-id from /var/lib/nfs/sm
Having /var/lib/nfs writeable by statd is not ideal
as there are files in there that statd doesn't need
to access.
Aftger dropping privs, statd and sm-notify only need to
access files in the directories sm and sm.bak.
So take the uid for these deamons from 'sm'.
Signed-off-by: NeilBrown <neilb@suse.com>
---
support/nsm/file.c | 16 +++++-----------
1 file changed, 5 insertions(+), 11 deletions(-)
--- a/support/nsm/file.c
+++ b/support/nsm/file.c
@@ -388,23 +388,17 @@ nsm_drop_privileges(const int pidfd)
(void)umask(S_IRWXO);
- /*
- * XXX: If we can't stat dirname, or if dirname is owned by
- * root, we should use "statduser" instead, which is set up
- * by configure.ac. Nothing in nfs-utils seems to use
- * "statduser," though.
- */
- if (lstat(nsm_base_dirname, &st) == -1) {
- xlog(L_ERROR, "Failed to stat %s: %m", nsm_base_dirname);
- return false;
- }
-
if (chdir(nsm_base_dirname) == -1) {
xlog(L_ERROR, "Failed to change working directory to %s: %m",
nsm_base_dirname);
return false;
}
+ if (lstat(NSM_MONITOR_DIR, &st) == -1) {
+ xlog(L_ERROR, "Failed to stat %s/%s: %m", nsm_base_dirname, NSM_MONITOR_DIR);
+ return false;
+ }
+
if (!prune_bounding_set())
return false;

8
nfs-utils.changes
View File

@ -2,9 +2,13 @@
Mon Sep 16 23:43:37 UTC 2019 - Neil Brown <nfbrown@suse.com>
- Don't make /var/lib/nfs owned by statd.
Only sm sm.bak and state need to be accessible by
statd. Providing they get created, the parent
Only sm and sm.bak need to be accessible by
statd or sm-notify after they drop privs.
Providing they get created, the parent
directory can be root-owned.
- 0007-statd-user-from-sm
Change rpc.statd and sm-notify to take uid from the sm
directory.
(bsc#1150733 CVE-2019-3689)
-------------------------------------------------------------------

10
nfs-utils.spec
View File

@ -51,6 +51,7 @@ Patch3: 0003-systemd-run-statd-notify-even-when-nfs-client-isn-t-.patch
Patch4: 0004-nfsidmap-honour-with-pluginpath-for-instalation.patch
Patch5: 0005-nfs.conf-fail-to-disable-major-NFS-version-4-using-v.patch
Patch6: 0006-nfs.conf-silence-include-error.patch
Patch7: 0007-statd-user-from-sm
BuildRequires: e2fsprogs-devel
BuildRequires: fedfs-utils-devel
@ -154,6 +155,7 @@ This package contains additional NFS documentation.
%patch4 -p1
%patch5 -p1
%patch6 -p1
%patch7 -p1
cp %{SOURCE6} .
@ -220,9 +222,9 @@ chmod 644 %{buildroot}%{_sbindir}/{mountstats,nfsiostat}
%service_add_pre auth-rpcgss-module.service nfs-idmapd.service nfs-blkmap.service rpc-statd-notify.service rpc-gssd.service rpc-statd.service rpc-svcgssd.service
%post -n nfs-client
chown statd:nogroup %{_localstatedir}/lib/nfs > /dev/null 2>&1 || :
for i in state sm sm.bak; do
chown -R statd %{_localstatedir}/lib/nfs/$i > /dev/null 2>&1 || :
chown root:root %{_localstatedir}/lib/nfs > /dev/null 2>&1 || :
for i in sm sm.bak; do
chown -R statd:nogroup %{_localstatedir}/lib/nfs/$i > /dev/null 2>&1 || :
done
### migrate from /var/lock/subsys
[ -d /run/nfs ] || mkdir /run/nfs
@ -349,7 +351,7 @@ fi
%dir %{_localstatedir}/lib/nfs/v4recovery
%attr(0700,statd,nogroup) %dir %{_localstatedir}/lib/nfs/sm
%attr(0700,statd,nogroup) %dir %{_localstatedir}/lib/nfs/sm.bak
%attr(0700,statd,nogroup) %ghost %{_localstatedir}/lib/nfs/state
%ghost %{_localstatedir}/lib/nfs/state
%files -n nfs-kernel-server
%defattr(-,root,root)