|
 |
e7a346 |
From d5c5cbe82ef0f7bf8686e71cf08b92e7baf62f55 Mon Sep 17 00:00:00 2001
|
|
|
e7a346 |
From: Ravishankar N <ravishankar@redhat.com>
|
|
|
e7a346 |
Date: Sat, 6 Oct 2018 00:50:53 +0530
|
|
|
e7a346 |
Subject: [PATCH 395/399] index: prevent arbitrary file creation outside
|
|
|
e7a346 |
entry-changes folder
|
|
|
e7a346 |
|
|
|
e7a346 |
Problem:
|
|
|
e7a346 |
A compromised client can set arbitrary values for the GF_XATTROP_ENTRY_IN_KEY
|
|
|
e7a346 |
and GF_XATTROP_ENTRY_OUT_KEY during xattrop fop. These values are
|
|
|
e7a346 |
consumed by index as a filename to be created/deleted according to the key.
|
|
|
e7a346 |
Thus it is possible to create/delete random files even outside the gluster
|
|
|
e7a346 |
volume boundary.
|
|
|
e7a346 |
|
|
|
e7a346 |
Fix:
|
|
|
e7a346 |
Index expects the filename to be a basename, i.e. it must not contain any
|
|
|
e7a346 |
pathname components like "/" or "../". Enforce this.
|
|
|
e7a346 |
|
|
|
e7a346 |
Fixes: CVE-2018-14654
|
|
|
e7a346 |
BUG: 1634671
|
|
|
e7a346 |
Change-Id: Ib01c35414c36e3101af9e99a1ea17535ef8bd3b3
|
|
|
e7a346 |
Signed-off-by: Ravishankar N <ravishankar@redhat.com>
|
|
|
e7a346 |
Reviewed-on: https://code.engineering.redhat.com/gerrit/151985
|
|
|
e7a346 |
Reviewed-by: Amar Tumballi <amarts@redhat.com>
|
|
|
e7a346 |
Reviewed-by: Sunil Kumar Heggodu Gopala Acharya <sheggodu@redhat.com>
|
|
|
e7a346 |
---
|
|
|
e7a346 |
xlators/features/index/src/index.c | 19 +++++++++++++++++++
|
|
|
e7a346 |
1 file changed, 19 insertions(+)
|
|
|
e7a346 |
|
|
|
e7a346 |
diff --git a/xlators/features/index/src/index.c b/xlators/features/index/src/index.c
|
|
|
e7a346 |
index bf3f4dd..89cdbda 100644
|
|
|
e7a346 |
--- a/xlators/features/index/src/index.c
|
|
|
e7a346 |
+++ b/xlators/features/index/src/index.c
|
|
|
e7a346 |
@@ -852,6 +852,15 @@ index_entry_create (xlator_t *this, inode_t *inode, char *filename)
|
|
|
e7a346 |
ctx->state[ENTRY_CHANGES] = IN;
|
|
|
e7a346 |
}
|
|
|
e7a346 |
|
|
|
e7a346 |
+ if (strchr (filename, '/')) {
|
|
|
e7a346 |
+ gf_msg (this->name, GF_LOG_ERROR, EINVAL,
|
|
|
e7a346 |
+ INDEX_MSG_INDEX_ADD_FAILED,
|
|
|
e7a346 |
+ "Got invalid entry (%s) for pargfid path (%s)",
|
|
|
e7a346 |
+ filename, pgfid_path);
|
|
|
e7a346 |
+ op_errno = EINVAL;
|
|
|
e7a346 |
+ goto out;
|
|
|
e7a346 |
+ }
|
|
|
e7a346 |
+
|
|
|
e7a346 |
op_errno = 0;
|
|
|
e7a346 |
|
|
|
e7a346 |
snprintf (entry_path, sizeof(entry_path), "%s/%s", pgfid_path,
|
|
|
e7a346 |
@@ -886,6 +895,16 @@ index_entry_delete (xlator_t *this, uuid_t pgfid, char *filename)
|
|
|
e7a346 |
|
|
|
e7a346 |
make_gfid_path (priv->index_basepath, ENTRY_CHANGES_SUBDIR, pgfid,
|
|
|
e7a346 |
pgfid_path, sizeof (pgfid_path));
|
|
|
e7a346 |
+
|
|
|
e7a346 |
+ if (strchr (filename, '/')) {
|
|
|
e7a346 |
+ gf_msg (this->name, GF_LOG_ERROR, EINVAL,
|
|
|
e7a346 |
+ INDEX_MSG_INDEX_DEL_FAILED,
|
|
|
e7a346 |
+ "Got invalid entry (%s) for pargfid path (%s)",
|
|
|
e7a346 |
+ filename, pgfid_path);
|
|
|
e7a346 |
+ op_errno = EINVAL;
|
|
|
e7a346 |
+ goto out;
|
|
|
e7a346 |
+ }
|
|
|
e7a346 |
+
|
|
|
e7a346 |
snprintf (entry_path, sizeof(entry_path), "%s/%s", pgfid_path,
|
|
|
e7a346 |
filename);
|
|
|
e7a346 |
|
|
|
e7a346 |
--
|
|
|
e7a346 |
1.8.3.1
|
|
|
e7a346 |
|