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| author | Lee Duncan <lduncan@suse.com> | 2021-02-23 13:06:24 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-07 12:19:00 +0100 |
| commit | ae84b246a76c4ace5997e5ca7e9fde3e1a526bc3 (patch) | |
| tree | bbce8e5608fa7193a1780f781e93e9bf4e7765ea | |
| parent | 4b2b65055c7617669943e40c7cdce9ead762b9fa (diff) | |
| download | linux-stable-ae84b246a76c4ace5997e5ca7e9fde3e1a526bc3.tar.gz linux-stable-ae84b246a76c4ace5997e5ca7e9fde3e1a526bc3.tar.bz2 linux-stable-ae84b246a76c4ace5997e5ca7e9fde3e1a526bc3.zip | |
scsi: iscsi: Restrict sessions and handles to admin capabilities
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>
| -rw-r--r-- | drivers/scsi/scsi_transport_iscsi.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c index 698347301198..174bab398202 100644 --- a/drivers/scsi/scsi_transport_iscsi.c +++ b/drivers/scsi/scsi_transport_iscsi.c @@ -119,6 +119,9 @@ show_transport_handle(struct device *dev, struct device_attribute *attr, 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, struct nlmsghdr *nlh, uint32_t *group) 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 |