RE: exploit or human

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To: "'Cristian Stanca'" <cristian.stanca@radcom.ro>, <incidents@securityfocus.com>
Date: Tue, 29 Mar 2005 12:56:43 -0500

Are you up to date on the RedHat Kernel? I seem to recall there being a
kernel bug in RedHat 7.3 for ext3 filesystems that was resolved with an
updated kernel ~2 years ago.

Andrew

Cristian Stanca wrote:
> Hello,
>
> We've got a hard disk failure (bad blocks - reported the
> array controller
> bios) on a scsi hard-disk on an INTEL platform (running
> Fedora Core 2 Linux operating system). What is interesting is
> that this hard-disk failure occurred after a "I don't know
> what it is... let's reboot it and see after that" situation.
> Situation describe by many "segmentation fault" when using
> typical application like vi or service or even grub-install.
> Grub did not start again after that (we tried to reinstall it
> with an Install CD 1 from Fedora and grub-install did said
> "segmentation fault" again)
>
> We did recover the data on that scsi hard-drive by mounting
> it on another machine.
>
> So far so good (sort of)
>
> After a week or so, another Linux server, began to show the
> same errors while giving shell commands and also sshd
> listened on port 22 we cannot do a ssh on it. We did not make
> the connection to the previous case (as we thought was a
> possible hardware failure), reboot it and grub did not start.
> We boot again with an install CD from redhat 7.3 (as we had
> redhat 7.3 installed on that hard-disk, and thought if any
> files are missing...), the hard-disk was recognized by
> controller (again scsi hard-disk), fdisk view the partitions,
> and cannot this time mount them. (As I write this the "much
> more important data that hardware" hard-disk is at a computer
> service, for data recovery.
>
> Again, on a third Linux server (redhat 7.3) we got some
> messages at the primary console (kernel BUG commit.c #some
> number, lots of stack text and hexa symbols...) and again
> can't do ssh on it (it responds to ping and traceroute,
> telnet ip_address port 22 works...). We are kind of worried
> regarding the reboot of this machine...
>
> Could that be a worm, exploit or something, or looks like a
> human intervention situation?!
>
>
> In the mean time, we are working at a firewall and password policies.

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