linux/drivers/isdn
Dan Carpenter 7563487cbf isdnloop: several buffer overflows
There are three buffer overflows addressed in this patch.

1) In isdnloop_fake_err() we add an 'E' to a 60 character string and
then copy it into a 60 character buffer.  I have made the destination
buffer 64 characters and I'm changed the sprintf() to a snprintf().

2) In isdnloop_parse_cmd(), p points to a 6 characters into a 60
character buffer so we have 54 characters.  The ->eazlist[] is 11
characters long.  I have modified the code to return if the source
buffer is too long.

3) In isdnloop_command() the cbuf[] array was 60 characters long but the
max length of the string then can be up to 79 characters.  I made the
cbuf array 80 characters long and changed the sprintf() to snprintf().
I also removed the temporary "dial" buffer and changed it to use "p"
directly.

Unfortunately, we pass the "cbuf" string from isdnloop_command() to
isdnloop_writecmd() which truncates anything over 60 characters to make
it fit in card->omsg[].  (It can accept values up to 255 characters so
long as there is a '\n' character every 60 characters).  For now I have
just fixed the memory corruption bug and left the other problems in this
driver alone.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-08 12:41:13 -04:00
..
act2000 isdn: replace del_timer by del_timer_sync 2014-03-27 15:28:06 -04:00
capi isdn/capi: Make Middleware depend on CAPI2.0 2014-03-18 15:02:57 -04:00
divert isdn: divert, hysdn: fix interruptible_sleep_on race 2014-02-26 16:06:13 -05:00
gigaset
hardware isdn: remove deprecated IRQF_DISABLED 2013-10-17 15:13:20 -04:00
hisax isdn: hisax/elsa: fix sleep_on race in elsa FSM 2014-02-26 16:06:13 -05:00
hysdn isdn: divert, hysdn: fix interruptible_sleep_on race 2014-02-26 16:06:13 -05:00
i4l net: isdn: use sk_unattached_filter api 2014-03-31 00:45:09 -04:00
icn isdn: icn: NULL dereference printing error message 2013-11-07 19:11:13 -05:00
isdnloop isdnloop: several buffer overflows 2014-04-08 12:41:13 -04:00
mISDN Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-01-25 11:17:34 -08:00
pcbit isdn: pcbit: fix interruptible_sleep_on race 2014-02-26 16:06:12 -05:00
sc isdn: replace del_timer by del_timer_sync 2014-03-27 15:28:06 -04:00
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