Hi! > From: Lee Duncan <ldun...@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.
Should not normal filesystem permissions be used?
> +++ b/drivers/scsi/scsi_transport_iscsi.c
> @@ -132,6 +132,9 @@ 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);
AFAICT we make the file 0444 (world readable) and then fail the read
with capability check. If the file is not supposed to be
world-readable, it should have 0400 permissions, right?
Best regards,
Pavel
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
signature.asc
Description: Digital signature
