search for: input_userauth_banner

https://bugzilla.mindrot.org/show_bug.cgi?id=1533 Summary: input_userauth_banner incorrectly escapes banner Product: Portable OpenSSH Version: 5.1p1 Platform: All URL: http://bugs.gentoo.org/244222 OS/Version: All Status: NEW Severity: normal Priority: P2 Component: sshd Assi...

...essed at LogLevel=QUIET. This change was a side-effect of the following mod: - dtucker at cvs.openbsd.org 2003/10/07 01:47:27 [sshconnect2.c] Don't use logit for banner, since it truncates to MSGBUFSIZ; bz #668 & #707. ok markus@ The relevant code is in sshconnect2.c: input_userauth_banner(int type, u_int32_t seq, void *ctxt) { char *msg, *lang; debug3("input_userauth_banner"); msg = packet_get_string(NULL); lang = packet_get_string(NULL); if (options.log_level > SYSLOG_LEVEL_QUIET) fprintf(stderr, "%s",...

...tion on strnvis and found that it does not support multibyte chars and doesnt work well with international chars. Could you please share any workaround to display international chars like korean in banner message. I also found little information inthe changelog on why strnvis() was introduced in input_userauth_banner. Is it added to address any security vulnerability. Any information on this is appreciated. Regards, Bala

...ther add a flag or ignore the banner statement was the following simple code change. this is from openssh-5.1p1: *** sshconnect2.c.orig Thu Jul 17 03:15:43 2008 --- sshconnect2.c Fri Feb 13 09:19:22 2009 *************** *** 377,386 **** --- 377,387 ---- void input_userauth_banner(int type, u_int32_t seq, void *ctxt) { char *msg, *raw, *lang; u_int len; debug3("input_userauth_banner"); + if (!isatty(1) || !isatty(2)) return; raw = packet_get_string(&len); lang = packet_get_string(NULL)...

...ps://bugzilla.mindrot.org/attachment.cgi?id=2202&action=edit patch for the SkipBanner option Sometimes the login banner is annoying when the only allowed way to script access to the host is via the ssh client. The attached patch adds a "skipbanner" option, which will ignore the "input_userauth_banner" stage on connection (if set to yes). -- You are receiving this mail because: You are watching the assignee of the bug.

...shconnect2.c_orig Mon Apr 22 16:18:50 2002 +++ sshconnect2.c Mon Apr 22 16:18:58 2002 @@ -57,6 +57,7 @@ /* import */ extern char *client_version_string; extern char *server_version_string; +extern int supress_banner; extern Options options; /* @@ -320,7 +321,10 @@ debug3("input_userauth_banner"); msg = packet_get_string(NULL); lang = packet_get_string(NULL); - fprintf(stderr, "%s", msg); + if (supress_banner == 1) + debug3("noninteractive shell; banner supressed."); + else + fprintf(stderr, "%s&...

...ve_keys debug1: newkeys: mode 1 debug1: SSH2_MSG_NEWKEYS sent debug1: waiting for SSH2_MSG_NEWKEYS debug1: newkeys: mode 0 debug1: SSH2_MSG_NEWKEYS received debug1: done: ssh_kex2. debug1: send SSH2_MSG_SERVICE_REQUEST debug1: service_accept: ssh-userauth debug1: got SSH2_MSG_SERVICE_ACCEPT debug3: input_userauth_banner debug1: authentications that can continue: publickey,password,keyboard- interactive debug3: start over, passed a different list publickey,password,keyboard- interactive debug3: preferred publickey debug3: authmethod_lookup publickey debug3: remaining preferred: debug3: authmethod_is_enabled public...

..._NEWKEYS debug2: set_newkeys: mode 0 debug1: SSH2_MSG_NEWKEYS received debug1: Roaming not allowed by server debug1: SSH2_MSG_SERVICE_REQUEST sent debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug2: key: /.ssh/id_rsa (40057810) debug2: key: /.ssh/id_dsa (0) debug3: input_userauth_banner debug1: Authentications that can continue: password,keyboard-interactive,hostbased debug3: start over, passed a different list password,keyboard-interactive,hostbased debug3: preferred hostbased,publickey,keyboard-interactive,password debug3: authmethod_lookup hostbased debug3: remaining preferred:...

...ICE_REQUEST sent debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug2: key: /Users/user1/.ssh/id_rsa (0x7ff939e000c0), debug2: key: /Users/user1/.ssh/id_dsa (0x0), debug2: key: /Users/user1/.ssh/id_ecdsa (0x0), debug2: key: /Users/user1/.ssh/id_ed25519 (0x0), debug3: input_userauth_banner debug1: Authentications that can continue: publickey,password debug3: start over, passed a different list publickey,password debug3: preferred publickey,keyboard-interactive,password debug3: authmethod_lookup publickey debug3: remaining preferred: keyboard-interactive,password debug3: authmethod_is...

...ce_accept: ssh-userauth > debug1: SSH2_MSG_SERVICE_ACCEPT received > debug2: key: /Users/user1/.ssh/id_rsa (0x7ff939e000c0), > debug2: key: /Users/user1/.ssh/id_dsa (0x0), > debug2: key: /Users/user1/.ssh/id_ecdsa (0x0), > debug2: key: /Users/user1/.ssh/id_ed25519 (0x0), > debug3: input_userauth_banner > debug1: Authentications that can continue: publickey,password > debug3: start over, passed a different list publickey,password > debug3: preferred publickey,keyboard-interactive,password > debug3: authmethod_lookup publickey > debug3: remaining preferred: keyboard-interactive,passw...

...ug2: 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 debug3: input_userauth_banner .----------------------------------------------------------------------- ------------. . Welcome to my Music-Box. . . NO ACCESS IS GRANTED BEYOUND THIS POINT! . . Be aware that your connection a...

...debug3: Received SSH2_MSG_IGNORE debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug2: key: /u/wk/imorgan/.ssh/id_rsa (0x1be0780) debug2: key: /u/wk/imorgan/.ssh/identity ((nil)) debug2: key: /u/wk/imorgan/.ssh/id_dsa ((nil)) debug3: Received SSH2_MSG_IGNORE debug3: input_userauth_banner ---------------------------------------------------------------- WARNING! This is a US Government computer. This system is for the use of authorized users only. By accessing and using the computer system you are consenting to system monitoring, including the monitoring of keystrokes. Unauthorized...

...SH2_MSG_NEWKEYS received debug1: SSH2_MSG_SERVICE_REQUEST sent debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug2: key: /home/scottra/.ssh/identity (0x0) debug2: key: /home/scottra/.ssh/id_rsa (0x100e8d20) debug2: key: /home/scottra/.ssh/id_dsa (0x100e8d38) debug3: input_userauth_banner Unauthorized Access is Prohibited Use of University of Bozo computing and network facilities requires prior authorization. Unauthorized access is prohibited. Usage is subject to security testing and monitoring. Abuse is subject to criminal prosecution....

...a ((nil)) debug2: key: /root/.ssh/id_ecdsa ((nil)) debug2: key: /root/.ssh/id_ed25519 ((nil)) debug3: send packet: type 5 debug3: receive packet: type 6 debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug3: send packet: type 50 debug3: receive packet: type 53 debug3: input_userauth_banner Thank You debug3: receive packet: type 51 debug1: Authentications that can continue: keyboard-interactive,publickey,password debug3: start over, passed a different list keyboard-interactive,publickey,password debug3: preferred publickey,keyboard-interactive,password debug3: authmethod_lookup public...

...ng 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: /home/root/.ssh/id_rsa (20077848) debug2: key: /home/root/.ssh/id_dsa (20077868) debug3: input_userauth_banner ############################################################### # # # Access to this network and the information on it are # # lawfully available only for approved purposes by employees # # of Nortel Networks and other users author...

...ng 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: /home/root/.ssh/id_rsa (20077848) debug2: key: /home/root/.ssh/id_dsa (20077868) debug3: input_userauth_banner ############################################################### # # # Access to this network and the information on it are # # lawfully available only for approved purposes by employees # # of Nortel Networks and other users author...

...ng 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: /home/root/.ssh/id_rsa (20077848) debug2: key: /home/root/.ssh/id_dsa (20077868) debug3: input_userauth_banner ############################################################### # # # Access to this network and the information on it are # # lawfully available only for approved purposes by employees # # of Nortel Networks and other users author...

..._NEWKEYS debug1: newkeys: mode 0 debug1: set_newkeys: setting new keys for 'in' mode debug3: aes-128-ctr NID found debug1: SSH2_MSG_NEWKEYS received debug1: done: ssh_kex2. debug1: send SSH2_MSG_SERVICE_REQUEST debug2: service_accept: ssh-userauth debug1: got SSH2_MSG_SERVICE_ACCEPT debug3: input_userauth_banner sftp.gatewaydebug1: 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-i...

..._SERVICE_ACCEPT received > >> debug2: key: /Users/user1/.ssh/id_rsa (0x7ff939e000c0), > >> debug2: key: /Users/user1/.ssh/id_dsa (0x0), > >> debug2: key: /Users/user1/.ssh/id_ecdsa (0x0), > >> debug2: key: /Users/user1/.ssh/id_ed25519 (0x0), > >> debug3: input_userauth_banner > >> debug1: Authentications that can continue: publickey,password > >> debug3: start over, passed a different list publickey,password > >> debug3: preferred publickey,keyboard-interactive,password > >> debug3: authmethod_lookup publickey > >> debug3: re...

...debug1: Roaming not allowed by server debug1: SSH2_MSG_SERVICE_REQUEST sent debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug2: key: /.ssh/id_rsa (0x0), debug2: key: /.ssh/id_dsa (0x0), debug2: key: /.ssh/id_ecdsa (0x0), debug2: key: /.ssh/id_ed25519 (0x0), debug3: input_userauth_banner You are accessing a U.S. Government (USG) Information System (IS) that is provid ed for USG-authorized use only. By using this IS (which includes any device atta ched to this IS), you consent to the following conditions: - The USG routinely intercepts and monitors communications on this IS for purp...