SSH私钥以某种方式可供所有用户访问

debugcn 发表于 Dev

feshwfq

我不知道发生了什么事。理论上，我在计算机homedesktop上为用户“ user”生成了一个密钥对，并将公钥发送到myserver.example.com并将其放在下myserver:~user/.ssh/authorized_keys，我可以不用密码登录，没有问题。

问题是，奇怪的是，计算机家用台式机上的所有其他用户也可以使用user@myserver，而无需输入密码！您可能会认为该密钥可能只是在全局范围内可访问homedesktop:/etc/ssh，但不是（我删除了目录并再次尝试，仍然可以使用）。实际上，不仅是“ myserver”，所有具有“ user”公钥的服务器都接受“ homedesktop”上所有用户的无密码登录。从下面的SSH日志中看，好像密钥可能在内存中？我不知道发生了什么，以及如何防止其他用户使用此密钥！另外，homedesktop:~user/.ssh具有普通权限，其他用户无法读取。

在此示例中，“ otheruser”尝试以user @ myserver身份登录，可以访问user @ homedesktop密钥，这可以接受吗？

otheruser@homedesktop:~$ rm -rf .ssh
otheruser@homedesktop:~$ ssh -vvv -p 15555 [email protected]
OpenSSH_6.6.1, OpenSSL 1.0.1f 6 Jan 2014
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to myserver.example.com [123.234.123.234] port 15555.
debug1: Connection established.
debug1: SELinux support disabled
debug1: identity file /home/otheruser/.ssh/id_rsa type -1
debug1: identity file /home/otheruser/.ssh/id_rsa-cert type -1
debug1: identity file /home/otheruser/.ssh/id_dsa type -1
debug1: identity file /home/otheruser/.ssh/id_dsa-cert type -1
debug1: identity file /home/otheruser/.ssh/id_ecdsa type -1
debug1: identity file /home/otheruser/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/otheruser/.ssh/id_ed25519 type -1
debug1: identity file /home/otheruser/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.6
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.3
debug1: match: OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.3 pat OpenSSH_6.6.1* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug3: put_host_port: [myserver.example.com]:15555
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: [email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,[email protected],[email protected],[email protected],aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,[email protected],[email protected],[email protected],aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-md5,hmac-sha1,[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-md5,hmac-sha1,[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,[email protected],zlib
debug2: kex_parse_kexinit: none,[email protected],zlib
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: first_kex_follows 0 
debug2: kex_parse_kexinit: reserved 0 
debug2: kex_parse_kexinit: [email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256,ssh-ed25519
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,[email protected],[email protected],[email protected],aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,[email protected],[email protected],[email protected],aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-md5,hmac-sha1,[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-md5,hmac-sha1,[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,[email protected]
debug2: kex_parse_kexinit: none,[email protected]
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: first_kex_follows 0 
debug2: kex_parse_kexinit: reserved 0 
debug2: mac_setup: setup [email protected]
debug1: kex: server->client aes128-ctr [email protected] none
debug2: mac_setup: setup [email protected]
debug1: kex: client->server aes128-ctr [email protected] none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA 9d:ce:c8:e4:39:43:f5:3a:0b:11:0b:77:78:cd:63:2f
debug3: put_host_port: [123.234.123.234]:15555
debug3: put_host_port: [myserver.example.com]:15555
debug1: checking without port identifier
The authenticity of host '[myserver.example.com]:15555 ([123.234.123.234]:15555)' can't be established.
ECDSA key fingerprint is 9d:ce:c8:e4:39:43:f5:3a:0b:11:0b:77:78:cd:63:2f.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '[myserver.example.com]:15555,[123.234.123.234]:15555' (ECDSA) to the list of known hosts.
debug1: ssh_ecdsa_verify: signature correct
debug2: kex_derive_keys
debug2: set_newkeys: mode 1
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug2: set_newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug2: key: user@myserver (0x7fba1acf8000),
debug2: key: user@homedesktop (0x7fbaa1bbcf30),
debug2: key: /home/otheruser/.ssh/id_rsa ((nil)),
debug2: key: /home/otheruser/.ssh/id_dsa ((nil)),
debug2: key: /home/otheruser/.ssh/id_ecdsa ((nil)),
debug2: key: /home/otheruser/.ssh/id_ed25519 ((nil)),
debug1: Authentications that can continue: publickey,password
debug3: start over, passed a different list publickey,password
debug3: preferred gssapi-keyex,gssapi-with-mic,publickey,keyboard-interactive,password
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: user@myserver
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: Authentications that can continue: publickey,password
debug1: Offering DSA public key: user@homedesktop
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: Server accepts key: pkalg ssh-dss blen 433
debug2: input_userauth_pk_ok: fp d2:43:29:a0:88:06:a1:d2:1d:7a:65:15:4f:f8:95:eb
debug3: sign_and_send_pubkey: DSA d2:43:29:a0:88:06:a1:d2:1d:7a:65:15:4f:f8:95:eb
debug1: Authentication succeeded (publickey).
Authenticated to myserver.example.com ([123.234.123.234]:15555).
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug1: Requesting [email protected]
debug1: Entering interactive session.
debug2: callback start
debug2: fd 3 setting TCP_NODELAY
debug3: packet_set_tos: set IP_TOS 0x10
debug2: client_session2_setup: id 0
debug2: channel 0: request pty-req confirm 1
debug1: Sending environment.
debug1: Sending env LC_PAPER = en_US.UTF-8
debug2: channel 0: request env confirm 0
debug3: Ignored env XDG_VTNR
debug3: Ignored env XDG_SESSION_ID
debug3: Ignored env KDE_MULTIHEAD
debug1: Sending env LC_ADDRESS = en_US.UTF-8
debug2: channel 0: request env confirm 0
debug1: Sending env LC_MONETARY = en_US.UTF-8
debug2: channel 0: request env confirm 0
debug3: Ignored env XDG_GREETER_DATA_DIR
debug3: Ignored env CLUTTER_IM_MODULE
debug3: Ignored env SELINUX_INIT
debug3: Ignored env SESSION
debug3: Ignored env GPG_AGENT_INFO
debug3: Ignored env SHELL
debug3: Ignored env TERM
debug3: Ignored env XDG_SESSION_COOKIE
debug3: Ignored env KONSOLE_DBUS_SERVICE
debug3: Ignored env GTK2_RC_FILES
debug3: Ignored env KONSOLE_PROFILE_NAME
debug3: Ignored env GS_LIB
debug3: Ignored env GTK_RC_FILES
debug1: Sending env LC_NUMERIC = en_US.UTF-8
debug2: channel 0: request env confirm 0
debug3: Ignored env WINDOWID
debug3: Ignored env GNOME_KEYRING_CONTROL
debug3: Ignored env UPSTART_SESSION
debug3: Ignored env SHELL_SESSION_ID
debug3: Ignored env KDE_FULL_SESSION
debug3: Ignored env USER
debug1: Sending env LC_TELEPHONE = en_US.UTF-8
debug2: channel 0: request env confirm 0
debug3: Ignored env LS_COLORS
debug3: Ignored env XDG_SESSION_PATH
debug3: Ignored env XDG_SEAT_PATH
debug3: Ignored env SSH_AUTH_SOCK
debug3: Ignored env DEFAULTS_PATH
debug3: Ignored env SESSION_MANAGER
debug3: Ignored env XDG_CONFIG_DIRS
debug3: Ignored env MAIL
debug3: Ignored env PATH
debug3: Ignored env DESKTOP_SESSION
debug3: Ignored env QT_IM_MODULE
debug1: Sending env LC_IDENTIFICATION = en_US.UTF-8
debug2: channel 0: request env confirm 0
debug3: Ignored env PWD
debug3: Ignored env JOB
debug3: Ignored env XMODIFIERS
debug3: Ignored env KONSOLE_DBUS_WINDOW
debug3: Ignored env KDE_SESSION_UID
debug3: Ignored env GNOME_KEYRING_PID
debug1: Sending env LANG = en_US.UTF-8
debug2: channel 0: request env confirm 0
debug3: Ignored env GDM_LANG
debug3: Ignored env MANDATORY_PATH
debug1: Sending env LC_MEASUREMENT = en_US.UTF-8
debug2: channel 0: request env confirm 0
debug3: Ignored env IM_CONFIG_PHASE
debug3: Ignored env KONSOLE_DBUS_SESSION
debug3: Ignored env GDMSESSION
debug3: Ignored env SESSIONTYPE
debug3: Ignored env HOME
debug3: Ignored env XDG_SEAT
debug3: Ignored env SHLVL
debug3: Ignored env COLORFGBG
debug3: Ignored env LANGUAGE
debug3: Ignored env KDE_SESSION_VERSION
debug3: Ignored env XCURSOR_THEME
debug3: Ignored env UPSTART_INSTANCE
debug3: Ignored env PYTHONPATH
debug3: Ignored env LOGNAME
debug3: Ignored env UPSTART_EVENTS
debug3: Ignored env XDG_DATA_DIRS
debug3: Ignored env DBUS_SESSION_BUS_ADDRESS
debug3: Ignored env QT4_IM_MODULE
debug3: Ignored env LESSOPEN
debug3: Ignored env TEXTDOMAIN
debug3: Ignored env UPSTART_JOB
debug3: Ignored env INSTANCE
debug3: Ignored env DISPLAY
debug3: Ignored env XDG_RUNTIME_DIR
debug3: Ignored env PROFILEHOME
debug3: Ignored env QT_PLUGIN_PATH
debug3: Ignored env GTK_IM_MODULE
debug3: Ignored env XDG_CURRENT_DESKTOP
debug3: Ignored env PAM_KWALLET_LOGIN
debug1: Sending env LC_TIME = en_US.UTF-8
debug2: channel 0: request env confirm 0
debug3: Ignored env LESSCLOSE
debug3: Ignored env TEXTDOMAINDIR
debug1: Sending env LC_NAME = en_US.UTF-8
debug2: channel 0: request env confirm 0
debug3: Ignored env XAUTHORITY
debug3: Ignored env _
debug3: Ignored env OLDPWD
debug2: channel 0: request shell confirm 1
debug2: callback done
debug2: channel 0: open confirm rwindow 0 rmax 32768
debug2: channel_input_status_confirm: type 99 id 0
debug2: PTY allocation request accepted on channel 0
debug2: channel 0: rcvd adjust 2097152
debug2: channel_input_status_confirm: type 99 id 0
debug2: shell request accepted on channel 0
Welcome to MYSERVER!!

Last login: Tue Nov  1 21:05:47 2016 from 111.222.111.222
user@myserver:~$

debug1: Offering DSA public key: user@homedesktop
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: Server accepts key: pkalg ssh-dss blen 433
debug2: input_userauth_pk_ok: fp d2:43:29:a0:88:06:a1:d2:1d:7a:65:15:4f:f8:95:eb
debug3: sign_and_send_pubkey: DSA d2:43:29:a0:88:06:a1:d2:1d:7a:65:15:4f:f8:95:eb
debug1: Authentication succeeded (publickey).
Authenticated to myserver.example.com ([123.234.123.234]:15555).

说密钥存储在您的会话中ssh-agent。在ssh没有您的连接的情况下运行，ssh-agent将不允许您访问：

SSH_AUTH_SOCK="" ssh -vvv -p 15555 [email protected]

另外，杀死代理将完成此工作：（eval $(ssh-agent -k)如果您不使用gnome-keyring）。否则，从您的DE重新登录将“刷新”密钥。

本文收集自互联网，转载请注明来源。

如有侵权，请联系[email protected] 删除。

编辑于2021-06-10

我来说两句

0条评论

登录后参与评论

来自分类Dev

Related 相关文章

文章

SSH私钥以某种方式可供所有用户访问

SSH私钥以某种方式可供所有用户访问

如何使文件在Visual Basic应用程序中可供所有用户访问

如何使红宝石宝石可供所有用户使用？

如何使CentOS7中的Android MTP可供所有用户使用？

如何获取可以通过ssh访问服务器的所有用户的列表？

如何为终端服务器上的所有用户设置快速访问快捷方式？

如何为所有用户设置无密码的SSH

安装Anaconda并为所有用户访问python

fstab中所有用户的可写访问

重置根密码后，所有用户的“访问被拒绝”

如何从数据库访问所有用户？

授予所有用户访问谷歌日历的权限

所有用户的别名

我可以以某种方式暂停在后台登录的用户的所有进程吗？

使目录中的所有新文件可供组访问

如何从 ssh 服务器中的 ssh 客户端注销所有用户？

如何禁用除一个用户外的所有用户的ssh登录？

Facebook用户访问令牌未返回所有用户信息

iptables：试图阻止除指定用户以外的所有用户的网络访问

所有用户的用户设置

以某种方式限制对ssh服务器的访问

在Windows中以编程方式附加到所有用户的路径。

如何在Windows 7上为所有用户创建Java Webstart快捷方式？

如何等待所有用户通过Google脚本以编程方式响应Google表单？

在活动管理员中记录所有用户活动的最佳方式

Inno Setup在所有用户的所有桌面上创建单独的快捷方式

通过Python脚本为所有用户拒绝基于密码的SSH登录

管理员如何访问特定域中所有用户的Google云端硬盘内容？

如何访问GRAPH API以使所有用户都无需登录？

LinkedIn API是否允许访问所有用户个人资料？