lkml.org 
[lkml]   [2021]   [Mar]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4.14 31/39] scsi: iscsi: Restrict sessions and handles to admin capabilities
Date
From: Lee Duncan <lduncan@suse.com>

commit 688e8128b7a92df982709a4137ea4588d16f24aa upstream.

Protect the iSCSI transport handle, available in sysfs, by requiring
CAP_SYS_ADMIN to read it. Also protect the netlink socket by restricting
reception of messages to ones sent with CAP_SYS_ADMIN. This disables
normal users from being able to end arbitrary iSCSI sessions.

Cc: stable@vger.kernel.org
Reported-by: Adam Nichols <adam@grimm-co.com>
Reviewed-by: Chris Leech <cleech@redhat.com>
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Lee Duncan <lduncan@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/scsi/scsi_transport_iscsi.c | 6 ++++++
1 file changed, 6 insertions(+)

--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -119,6 +119,9 @@ show_transport_handle(struct device *dev
char *buf)
{
struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport));
}
static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
@@ -3504,6 +3507,9 @@ iscsi_if_recv_msg(struct sk_buff *skb, s
struct iscsi_cls_conn *conn;
struct iscsi_endpoint *ep = NULL;

+ if (!netlink_capable(skb, CAP_SYS_ADMIN))
+ return -EPERM;
+
if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
*group = ISCSI_NL_GRP_UIP;
else

\
 
 \ /
  Last update: 2021-03-05 13:41    [W:0.109 / U:0.464 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site