[CentOS] SSHD rootkit in the wild/compromise for CentOS 5/6?

[Johnny Hughes]

On 02/25/2013 04:24 PM, Gelen James wrote:
> 'rpm -V' can be misleading, if taking into account of prelink on Redhat/Centos Boxes which is running through cron by default. I've shown the steps on reverse the effect of prelink at the comments sections at link https://isc.sans.edu/diary/SSHD+rootkit+in+the+wild/15229?storyid=15229. I'm afraid that 'rpm -V' only will make big noises or false alarms.
>
> But in general, maybe it is a good time to turn off prelink, or more aggressively, remove prelink packages from Centos 5/6? the prelink is said to bring some performance boost, but who really cares in the era of tens of CPUs? nowadays and later on we are -- and will -- more concerned on security threats instead of 3~5 percents CPU/performance gain, right?

RHEL does prelinking by default, we therefore will never turn it off in
CentOS by default.

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