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- djm@cvs.openbsd.org 2013/10/29 09:48:02
[servconf.c servconf.h session.c sshd_config sshd_config.5]
shd_config PermitTTY to disallow TTY allocation, mirroring the
longstanding no-pty authorized_keys option;
bz#2070, patch from Teran McKinney; ok markus@
This commit is contained in:
Damien Miller
parent
4a3a9d4bbf
commit
5ff30c6b68
@ -4,6 +4,11 @@
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[key.c key.h]
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fix potential stack exhaustion caused by nested certificates;
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report by Mateusz Kocielski; ok dtucker@ markus@
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- djm@cvs.openbsd.org 2013/10/29 09:48:02
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[servconf.c servconf.h session.c sshd_config sshd_config.5]
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shd_config PermitTTY to disallow TTY allocation, mirroring the
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longstanding no-pty authorized_keys option;
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bz#2070, patch from Teran McKinney; ok markus@
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20131026
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- (djm) OpenBSD CVS Sync
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14
servconf.c
14
servconf.c
@ -1,5 +1,5 @@
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/* $OpenBSD: servconf.c,v 1.243 2013/10/24 00:51:48 dtucker Exp $ */
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/* $OpenBSD: servconf.c,v 1.244 2013/10/29 09:48:02 djm Exp $ */
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/*
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* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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* All rights reserved
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@ -92,6 +92,7 @@ initialize_server_options(ServerOptions *options)
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options->x11_forwarding = -1;
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options->x11_display_offset = -1;
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options->x11_use_localhost = -1;
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options->permit_tty = -1;
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options->xauth_location = NULL;
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options->strict_modes = -1;
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options->tcp_keep_alive = -1;
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@ -212,6 +213,8 @@ fill_default_server_options(ServerOptions *options)
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options->x11_use_localhost = 1;
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if (options->xauth_location == NULL)
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options->xauth_location = _PATH_XAUTH;
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if (options->permit_tty == -1)
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options->permit_tty = 1;
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if (options->strict_modes == -1)
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options->strict_modes = 1;
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if (options->tcp_keep_alive == -1)
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@ -329,7 +332,7 @@ typedef enum {
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sListenAddress, sAddressFamily,
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sPrintMotd, sPrintLastLog, sIgnoreRhosts,
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sX11Forwarding, sX11DisplayOffset, sX11UseLocalhost,
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sStrictModes, sEmptyPasswd, sTCPKeepAlive,
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sPermitTTY, sStrictModes, sEmptyPasswd, sTCPKeepAlive,
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sPermitUserEnvironment, sUseLogin, sAllowTcpForwarding, sCompression,
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sRekeyLimit, sAllowUsers, sDenyUsers, sAllowGroups, sDenyGroups,
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sIgnoreUserKnownHosts, sCiphers, sMacs, sProtocol, sPidFile,
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@ -462,6 +465,7 @@ static struct {
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{ "useprivilegeseparation", sUsePrivilegeSeparation, SSHCFG_GLOBAL},
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{ "acceptenv", sAcceptEnv, SSHCFG_ALL },
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{ "permittunnel", sPermitTunnel, SSHCFG_ALL },
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{ "permittty", sPermitTTY, SSHCFG_ALL },
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{ "match", sMatch, SSHCFG_ALL },
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{ "permitopen", sPermitOpen, SSHCFG_ALL },
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{ "forcecommand", sForceCommand, SSHCFG_ALL },
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@ -1132,6 +1136,10 @@ process_server_config_line(ServerOptions *options, char *line,
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charptr = &options->xauth_location;
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goto parse_filename;
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case sPermitTTY:
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intptr = &options->permit_tty;
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goto parse_flag;
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case sStrictModes:
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intptr = &options->strict_modes;
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goto parse_flag;
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@ -1783,6 +1791,7 @@ copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth)
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M_CP_INTOPT(x11_display_offset);
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M_CP_INTOPT(x11_forwarding);
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M_CP_INTOPT(x11_use_localhost);
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M_CP_INTOPT(permit_tty);
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M_CP_INTOPT(max_sessions);
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M_CP_INTOPT(max_authtries);
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M_CP_INTOPT(ip_qos_interactive);
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@ -2013,6 +2022,7 @@ dump_config(ServerOptions *o)
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dump_cfg_fmtint(sPrintLastLog, o->print_lastlog);
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dump_cfg_fmtint(sX11Forwarding, o->x11_forwarding);
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dump_cfg_fmtint(sX11UseLocalhost, o->x11_use_localhost);
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dump_cfg_fmtint(sPermitTTY, o->permit_tty);
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dump_cfg_fmtint(sStrictModes, o->strict_modes);
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dump_cfg_fmtint(sTCPKeepAlive, o->tcp_keep_alive);
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dump_cfg_fmtint(sEmptyPasswd, o->permit_empty_passwd);
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@ -1,4 +1,4 @@
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/* $OpenBSD: servconf.h,v 1.109 2013/07/19 07:37:48 markus Exp $ */
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/* $OpenBSD: servconf.h,v 1.110 2013/10/29 09:48:02 djm Exp $ */
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/*
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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@ -82,6 +82,7 @@ typedef struct {
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* searching at */
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int x11_use_localhost; /* If true, use localhost for fake X11 server. */
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char *xauth_location; /* Location of xauth program */
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int permit_tty; /* If false, deny pty allocation */
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int strict_modes; /* If true, require string home dir modes. */
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int tcp_keep_alive; /* If true, set SO_KEEPALIVE. */
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int ip_qos_interactive; /* IP ToS/DSCP/class for interactive */
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@ -1,4 +1,4 @@
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/* $OpenBSD: session.c,v 1.267 2013/10/14 21:20:52 djm Exp $ */
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/* $OpenBSD: session.c,v 1.268 2013/10/29 09:48:02 djm Exp $ */
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/*
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* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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* All rights reserved
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@ -2062,7 +2062,7 @@ session_pty_req(Session *s)
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u_int len;
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int n_bytes;
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if (no_pty_flag) {
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if (no_pty_flag || !options.permit_tty) {
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debug("Allocating a pty not permitted for this authentication.");
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return 0;
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}
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@ -1,4 +1,4 @@
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# $OpenBSD: sshd_config,v 1.91 2013/09/07 13:53:11 sthen Exp $
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# $OpenBSD: sshd_config,v 1.92 2013/10/29 09:48:02 djm Exp $
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# This is the sshd server system-wide configuration file. See
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# sshd_config(5) for more information.
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@ -101,6 +101,7 @@ AuthorizedKeysFile .ssh/authorized_keys
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#X11Forwarding no
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#X11DisplayOffset 10
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#X11UseLocalhost yes
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#PermitTTY yes
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#PrintMotd yes
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#PrintLastLog yes
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#TCPKeepAlive yes
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@ -127,4 +128,5 @@ Subsystem sftp /usr/libexec/sftp-server
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#Match User anoncvs
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# X11Forwarding no
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# AllowTcpForwarding no
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# PermitTTY no
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# ForceCommand cvs server
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@ -33,8 +33,8 @@
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $OpenBSD: sshd_config.5,v 1.163 2013/10/24 00:51:48 dtucker Exp $
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.Dd $Mdocdate: October 24 2013 $
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.\" $OpenBSD: sshd_config.5,v 1.164 2013/10/29 09:48:02 djm Exp $
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.Dd $Mdocdate: October 29 2013 $
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.Dt SSHD_CONFIG 5
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.Os
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.Sh NAME
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@ -813,6 +813,7 @@ Available keywords are
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.Cm PermitEmptyPasswords ,
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.Cm PermitOpen ,
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.Cm PermitRootLogin ,
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.Cm PermitTTY ,
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.Cm PermitTunnel ,
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.Cm PubkeyAuthentication ,
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.Cm RekeyLimit ,
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@ -942,6 +943,12 @@ and
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.Dq ethernet .
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The default is
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.Dq no .
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.It Cm PermitTTY
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Specifies whether
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.Xr pty 7
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allocation is permitted.
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The default is
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.Dq yes .
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.It Cm PermitUserEnvironment
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Specifies whether
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.Pa ~/.ssh/environment
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