On Monday 25 February 2013 14:24:28 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?storyid22
9. I'm afraid that 'rpm -V' only will make big noises or false alarms.
'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?storyid22
9. I'm afraid that 'rpm -V' only will make big noises or false alarms.
I think you may be confused as to the normal interaction between prelink and
"rpm -V". rpm knows about and disregards prelink sections in its verification:
[root at n1 ~]# md5sum /usr/bin/wc
4d97cc9894946fbb7ba45d0a247f16da /usr/bin/wc
[root at n1 ~]# prelink -m /usr/bin/wc
[root at n1 ~]# md5sum /usr/bin/wc
2db523c558b713b92987747dcbe59005 /usr/bin/wc
[root at n1 ~]# rpm -V coreutils
[root at n1 ~]# prelink -vu /usr/bin/wc
[root at n1 ~]# md5sum /usr/bin/wc
4d97cc9894946fbb7ba45d0a247f16da /usr/bin/wc
[root at n1 ~]# rpm -V coreutils
[root at n1 ~]#
/Peter
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