從 sshd 中刪除共享庫

mv /lib64/libkeyutils.so.1.9 /root
service sshd restart
Stopping sshd:                                             [  OK  ]
Starting sshd: /usr/sbin/sshd: error while loading shared libraries: libkeyutils.so.1: cannot open shared object file: No such file or directory
                                                          [FAILED]

如何從 SSHD 中刪除它？

需要解決這個問題： http ://www.webhostingtalk.com/showpost.php?p=8548338&postcount=4

現在我聽說了這個漏洞，請參考：http: //blog.solidshellsecurity.com/2013/02/18/0day-linuxcentos-sshd-spam-exploit-libkeyutils-so-1-9/

他們沒有使用 root 登錄，甚至沒有生成 bash 程序。如果 lib 被移出，並且 sshd 重新啟動，他們將無法再登錄。

關鍵是找出他們是如何進入的。在非標準埠上的完全升級的、ssh 密鑰受限的 sshd 正在受到損害。我的客戶都不是，但我收到了很多關於這個問題的銷售諮詢，所以我不知道機器的完整歷史。

[/lib64]# rpm -vV openssh
.........    /etc/ssh
.........  c /etc/ssh/moduli
.........    /usr/bin/ssh-keygen
.........    /usr/libexec/openssh
.........    /usr/libexec/openssh/ssh-keysign
.........    /usr/share/doc/openssh-5.3p1
.........  d /usr/share/doc/openssh-5.3p1/CREDITS
.........  d /usr/share/doc/openssh-5.3p1/ChangeLog
.........  d /usr/share/doc/openssh-5.3p1/INSTALL
.........  d /usr/share/doc/openssh-5.3p1/LICENCE
.........  d /usr/share/doc/openssh-5.3p1/OVERVIEW
.........  d /usr/share/doc/openssh-5.3p1/PROTOCOL
.........  d /usr/share/doc/openssh-5.3p1/PROTOCOL.agent
.........  d /usr/share/doc/openssh-5.3p1/README
.........  d /usr/share/doc/openssh-5.3p1/README.dns
.........  d /usr/share/doc/openssh-5.3p1/README.nss
.........  d /usr/share/doc/openssh-5.3p1/README.platform
.........  d /usr/share/doc/openssh-5.3p1/README.privsep
.........  d /usr/share/doc/openssh-5.3p1/README.smartcard
.........  d /usr/share/doc/openssh-5.3p1/README.tun
.........  d /usr/share/doc/openssh-5.3p1/TODO
.........  d /usr/share/doc/openssh-5.3p1/WARNING.RNG
.........  d /usr/share/man/man1/ssh-keygen.1.gz
.........  d /usr/share/man/man8/ssh-keysign.8.gz
[/lib64]# rpm -vV openssh-clients
S.5....T.  c /etc/ssh/ssh_config
.........    /usr/bin/.ssh.hmac
.........    /usr/bin/scp
.........    /usr/bin/sftp
.........    /usr/bin/slogin
.........    /usr/bin/ssh
.........    /usr/bin/ssh-add
.........    /usr/bin/ssh-agent
.........    /usr/bin/ssh-copy-id
.........    /usr/bin/ssh-keyscan
.........  d /usr/share/man/man1/scp.1.gz
.........  d /usr/share/man/man1/sftp.1.gz
.........  d /usr/share/man/man1/slogin.1.gz
.........  d /usr/share/man/man1/ssh-add.1.gz
.........  d /usr/share/man/man1/ssh-agent.1.gz
.........  d /usr/share/man/man1/ssh-copy-id.1.gz
.........  d /usr/share/man/man1/ssh-keyscan.1.gz
.........  d /usr/share/man/man1/ssh.1.gz
.........  d /usr/share/man/man5/ssh_config.5.gz
[/lib64]# rpm -vV openssh-server
.......T.  c /etc/pam.d/ssh-keycat
S.5....T.  c /etc/pam.d/sshd
.........    /etc/rc.d/init.d/sshd
S.5....T.  c /etc/ssh/sshd_config
.........  c /etc/sysconfig/sshd
.........    /usr/libexec/openssh/sftp-server
.........    /usr/libexec/openssh/ssh-keycat
.........    /usr/sbin/.sshd.hmac
.........    /usr/sbin/sshd
.........    /usr/share/doc/openssh-server-5.3p1
.........  d /usr/share/doc/openssh-server-5.3p1/HOWTO.ssh-keycat
.........  d /usr/share/man/man5/moduli.5.gz
.........  d /usr/share/man/man5/sshd_config.5.gz
.........  d /usr/share/man/man8/sftp-server.8.gz
.........  d /usr/share/man/man8/sshd.8.gz
.........    /var/empty/sshd

和

[/lib64]# rpm -qf /lib64/libkeyutils.so.1.9
file /lib64/libkeyutils.so.1.9 is not owned by any package
[/lib64]# rpm -vV keyutils-libs
....L....    /lib64/libkeyutils.so.1
.........    /lib64/libkeyutils.so.1.3
.........    /usr/share/doc/keyutils-libs-1.4
.........  d /usr/share/doc/keyutils-libs-1.4/LICENCE.LGPL

您的 SSH 守護程序和系統可能會受到威脅！

您不能信任伺服器上安裝的現有 SSH 守護程序。

要快速檢查，請對現有包執行 RPM 驗證。你可以這樣做：

rpm -vV openssh-server
rpm -vV openssh-clients
rpm -vV openssh

將每個命令的輸出用於S\.5. 這將告訴您二進製文件是否已更改。

臨時修復是重新安裝您的 openssh 設置，但這超出了此問題的範圍。請看以下…

如何處理受損的伺服器？

fsck 修復後 sshd 立即核心轉儲

最後一行下方的/etc/inittab中的條目-可能被破解？

引用自：https://serverfault.com/questions/476954