Re: Need help with rule - [124:7:1] smtp: Attempted header name buffer overflow

[Irish Settingg <irishsetting () gmail com>]

I basically wanted to know, this being a protocol based signature....what
in the protocol triggers this....can an email have a header size of more
than 64 bytes in normal circumstances. If yes this signature may be
suppressed.

Also can we make any change in a preprocessor rule to fit our environment

On 3 February 2015 at 19:06, Jason Wallace <jason.r.wallace () gmail com>
wrote:

> Take a look at the reference. CVE-2004-0105 is related to Metamail version
> 2.7. If you are not using Metamail, or if the version is greater than 2.7
> then you don't need to enable this rule.
>
> On Mon, Feb 2, 2015 at 5:24 PM, Irish Settingg <irishsetting () gmail com>
> wrote:
>
> > We have SNORT IDS in our environment and we are receiving a lot of such
> > alerts -
> >
> > [124:7:1] smtp: Attempted header name buffer overflow [Classification:
> > Attempted Administrator Privilege Gain] [Priority: 1] {TCP} Internal
> > IP:46125 -> Internal SMTP Server:25
> >
> >
> > Rule - [image: Inline images 2]
> >
> >
> > What is this rule actually looking for and what does the preprocessor
> > rule do here.....
> >
> >
> > Do We get false positives due to this....
> >
> > For the Signature above one forum suggested that if the email headers are
> > more than 64 characters - the alert gets triggered. I know that this rule
> > is not a REGEX based rule but how  does it check in the traffic if the
> > header is not normal. Basically I want to know if this rule is of any use
> > or not.
> >
> >
> >
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------------------------------------------------------------------------------
Dive into the World of Parallel Programming. The Go Parallel Website,
sponsored by Intel and developed in partnership with Slashdot Media, is your
hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now. http://goparallel.sourceforge.net/

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