Snort mailing list archives

Re: invalid use of byte_test on sid:16603


From: Russ Combs <rcombs () sourcefire com>
Date: Thu, 24 Jun 2010 15:37:52 -0400

OK Will, thanks for pointing that out.
Russ

On Thu, Jun 24, 2010 at 3:30 PM, Will Metcalf <william.metcalf () gmail com>wrote:

Haha... Well I guess thanks for silently fixing this ;-).... Maybe you
should update the snort manual to reflect this eh?

Regards,

Will

case '<': idx->operator = BT_LESS_THAN;
break;

case '>': idx->operator = BT_GREATER_THAN;
break;

Is now...

           case '>': idx->operator = BT_GREATER_THAN;
                     cptr++;
                     if (*cptr == '=')
                         idx->operator = BT_GREATER_THAN_EQUAL;
                     else
                         cptr--;
                     break;

          case '<': idx->operator = BT_LESS_THAN;
                     cptr++;
                     if (*cptr == '=')
                         idx->operator = BT_LESS_THAN_EQUAL;
                     else
                         cptr--;
                     break;

Regards,

Will

On Thu, Jun 24, 2010 at 11:21 AM, Will Metcalf
<william.metcalf () gmail com> wrote:
Unless something has changed I think the use of byte_test in sid:16603
is invalid as snort only parses the first char in ">=", actually
making the test byte_test:4,>,97612894,0,relative,little;. Also I have
the registered feed so if this is fixed already please disregard.

So I think you probably want to modify...

byte_test:4,>=,97612894,0,relative,little;

to be..

byte_test:4,>,97612893,0,relative,little;

Regards,

Will



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