Technology Insights

Ubuntu Linux Apache Error: [notice] child pid XXXX exit signal Segmentation fault (11)

I received the below error when troubleshooting an issue reported to me by a client regarding one of their intranet web sites not working properly. After some poking around I noticed that there were numerous segmentation faults being reported in the Apache error logs. I had previously set up the server to dump core files when there were segmentation faults within Apache so troubleshooting the error was fairly easy. It ended up being a connection issue with an AS400 that was down over the weekend at the company and I was able to verify this using the below information.

Information Security

Backtrack 4: Dmitry – Segmentation Fault Error When Using TCP Portscan Module

We have been working on a bunch of Backtrack 4 articles recently and one that I started writing awhile back but never finished was on Dmitry or the Deepmagic Information Gathering Tool. When using the TCP Portscan module combined with the output to a file switch, which is done using the -p switch for the TCP Portscan and -o + filename for the output to a file, you will receive a Segmentation Fault. Below is an example when running Dmitry from within Backtrack 4.

Technology Errors

Apache: [notice] child pid 27609 exit signal Segmentation fault (11)

After modify some Perl modules with CPAN I started getting the below errors in the Apache error_log.

[Sun Jul 12 14:15:03 2009] [notice] child pid 4329 exit signal Segmentation fault (11)
[Sun Jul 12 14:15:27 2009] [notice] child pid 4331 exit signal Segmentation fault (11)
[Sun Jul 12 14:15:30 2009] [notice] child pid 5065 exit signal Segmentation fault (11)
[Sun Jul 12 14:15:31 2009] [notice] child pid 4339 exit signal Segmentation fault (11)
[Sun Jul 12 14:15:48 2009] [notice] child pid 10111 exit signal Segmentation fault (11)
[Sun Jul 12 14:15:48 2009] [notice] child pid 4325 exit signal Segmentation fault (11)