[Snort-devel] Integer overflow in perfmonitor preprocessor

Hui cao huica at ...3461...
Wed Aug 5 12:07:40 EDT 2015


Hi Mike,

Thanks for reporting this issue. We will fix this issue the future release.

Best,
Hui.

On 08/05/2015 11:48 AM, Mike Cox wrote:
> Just an output bug.  Snort 2.9.7.5 is affected and probably previous 
> versions. In src/preprocessors/spp_perfmonitor.c there is this code:
>
> ParseError("Perfmonitor:  Invalid argument to \"%s\".  The "
>                         "value must be an integer between 0 and %d.",
>                         PERFMON_ARG__PKT_COUNT, UINT32_MAX)
>
> But the printf '%d' is signed and UINT32_MAX is unsigned so you get 
> output like this:
>
> Perfmonitor:  Invalid argument to "pktcnt".  The value must be an 
> integer between 0 and -1.
>
> Change '%d' to '%u' to fix.  Then you get proper output like:
>
> Perfmonitor: Invalid argument to "pktcnt".  The value must be an 
> integer between 0 and 4294967295.
>
> -Mike Cox
>
>
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