pam_open_session：系统错误和sudo：策略插件在/ etc / pam.d / password-auth中没有通过表达式的会话初始化失败

Question

我正在努力解决RHEL 7中的错误。我有一个REHL Image，只能通过SSH密钥访问，而无需用户/密码凭据。

为了防止90天后密码更新过程（使用SSH密钥无法实现），我在etc / pam.d / password-auth中添加了no_pass_expiry

但是当我尝试sudo时，我收到以下错误

pam.d]$ sudo su -
sudo: pam_open_session: System error
sudo: policy plugin failed session initialization

这只发生在90天之后。

Answer 1

您的密码可能已过期。例如...这里是一个过期用户的sudo：

[user@server ~]$ sudo whoami
sudo: pam_open_session: System error
sudo: policy plugin failed session initialization
[user@server ~]$ 

[user@server ~]$ chage -l user
Last password change                    : May 07, 2018
Password expires                    : Aug 05, 2018
Password inactive                   : never
Account expires                     : never
Minimum number of days between password change      : 1
Maximum number of days between password change      : 90
Number of days of warning before password expires   : 10

现在，如图所示，在重置过期标志后，sudo按预期工作：

[root@server]# chage -m 0 -M 99999 -I -1 -E -1 user
[root@server]# chage -l user
Last password change                    : May 07, 2018
Password expires                    : never
Password inactive                   : never
Account expires                     : never
Minimum number of days between password change      : 0
Maximum number of days between password change      : 99999
Number of days of warning before password expires   : 10

[user@server ~]$ sudo whoami
root

您可以通过检查类似的消息来确认/var/log/secure，如下所示：

Feb 27 16:59:14 server sudo: pam_unix(sudo:account): expired password for user user (password aged)
Feb 27 16:59:14 server sudo: user : TTY=pts/0 ; PWD=/home/user ; USER=anotheruser ; COMMAND=/usr/bin/whoami