DHCPD 4.1.1-P1 Occasional Segfault

[Norman Elton]

Hah, agreed. We actually used to run our own RPM of dhcpd. Might just
have to go back that way.

Thanks

Norman

On Wed, Oct 5, 2016 at 5:36 AM, Glenn Satchell
<glenn.satchell at uniq.com.au> wrote:
> The root cause is poor code in a very old version.
>
> The simple fix is to run a newer version, I'm sure there are RPMs around
> for newer ones that don't have that problem.
>
> I think this might be the bug, fixed around 4.2.0. This is from the
> RELNOTES file distributed with the source.
>
> ! Two packets were found that cause a server to halt.  The code
>   has been updated to properly process or reject the packets as
>   appropriate.  Thanks to David Zych at University of Illinois
>   for reporting this issue.  [ISC-Bugs #24960]
>   One CVE number for each class of packet.
>   CVE-2011-2748
>   CVE-2011-2749
>
> But if you're going to patch the code and recompile, just go to the newer
> version.
>
> regards,
> -glenn
>
> On Wed, October 5, 2016 7:28 am, Norman Elton wrote:
>> We are running RHEL6's version of ISC dhcpd (based on 4.1.1-p1). Every
>> few months, one of our servers mysteriously segfaults:
>>
>> dhcpd[30744]: segfault at 7f3ff02712c8 ip 00007f3ff02712c8 sp
>> 00007ffe16d0eb58 error 15 in libc-2.12.so[7f3ff0271000+2000]
>>
>> What is the recommended way to begin finding a root cause?
>>
>> Thanks!
>>
>> Norman Elton
>> College of William & Mary
>> _______________________________________________
>> dhcp-users mailing list
>> dhcp-users at lists.isc.org
>> https://lists.isc.org/mailman/listinfo/dhcp-users
>>
>
>
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