Re: [mod-security-users] PCRE limits exceeded

[Ryan B. <RBa...@tr...>]

On 8/2/11 12:57 PM, "Art Age Software" <art...@gm...> wrote:

>I'm running into this on a fresh install of mod_security 2.5.12 with
>crs_2.2.1 on CentOS 6. For every page request, I get **two**
>occurrences in the error logs of this message: ModSecurity: Rule
>execution error - PCRE limits exceeded (-8): (null)

You need to see exactly which rules are triggering those.  I am suspecting
they are the new SQLi rules.  Check the file/line number.


>
>I have been able to eliminate the error by setting: SecPcreMatchLimit 8000
>
>However, this seems like an awfully high setting, given the default of
>1500. Is this expected behavior, or should I be concerned?

The concern is mainly related to performance/latency.

>
>And when the error occurs, does this indicate that mod-security has
>halted rule processing for the request (i.e. dropped protection)?

The error means that that particular rule has exited due to PCRE recursion
limits.

-Ryan

>
>Thanks.
>
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