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| author | Lee Duncan <lduncan@suse.com> | 2021-02-23 13:06:24 -0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2021-03-04 20:09:50 -0500 |
| commit | 688e8128b7a92df982709a4137ea4588d16f24aa (patch) | |
| tree | d86dc54e1bd181e77e16edfba22f09e9ae612786 | |
| parent | f69d02e37a85645aa90d18cacfff36dba370f797 (diff) | |
| download | linux-688e8128b7a92df982709a4137ea4588d16f24aa.tar.gz | |
scsi: iscsi: Restrict sessions and handles to admin capabilities
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>
| -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 969d24d580e2..69a1f55499ef 100644 --- a/drivers/scsi/scsi_transport_iscsi.c +++ b/drivers/scsi/scsi_transport_iscsi.c @@ -132,6 +132,9 @@ 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); @@ -3621,6 +3624,9 @@ 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 |