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-rw-r--r--common.h2
-rw-r--r--init.c2
-rw-r--r--misc.c7
-rw-r--r--misc.h10
-rw-r--r--multi.c6
-rw-r--r--socket.c2
-rw-r--r--ssl.c4
-rw-r--r--win32.c5
8 files changed, 27 insertions, 11 deletions
diff --git a/common.h b/common.h
index 5548f7c..ff3a0d5 100644
--- a/common.h
+++ b/common.h
@@ -97,6 +97,6 @@ typedef unsigned long ptr_type;
/*
* Script security warning
*/
-#define SCRIPT_SECURITY_WARNING "openvpn_execve: external program may not be called unless '--script-security 2' or higher is enabled. Use '--script-security 3 system' for backward compatibility with 2.1_rc8 and earlier. See --help text or man page for detailed info."
+#define SCRIPT_SECURITY_WARNING "WARNING: External program may not be called unless '--script-security 2' or higher is enabled. Use '--script-security 3 system' for backward compatibility with 2.1_rc8 and earlier. See --help text or man page for detailed info."
#endif
diff --git a/init.c b/init.c
index 636e0e4..5f64c05 100644
--- a/init.c
+++ b/init.c
@@ -1191,7 +1191,7 @@ do_route (const struct options *options,
struct argv argv = argv_new ();
setenv_str (es, "script_type", "route-up");
argv_printf (&argv, "%sc", options->route_script);
- openvpn_execve_check (&argv, es, S_SCRIPT, "Route script failed");
+ openvpn_run_script (&argv, es, 0, "--route-up");
argv_reset (&argv);
}
diff --git a/misc.c b/misc.c
index f5ce590..1e863f2 100644
--- a/misc.c
+++ b/misc.c
@@ -229,7 +229,7 @@ run_up_down (const char *command,
ifconfig_local, ifconfig_remote,
context);
argv_msg (M_INFO, &argv);
- openvpn_execve_check (&argv, es, S_SCRIPT|S_FATAL, "script failed");
+ openvpn_run_script (&argv, es, S_FATAL, "--up/--down");
argv_reset (&argv);
}
@@ -492,6 +492,7 @@ openvpn_execve_allowed (const unsigned int flags)
return script_security >= SSEC_BUILT_IN;
}
+
#ifndef WIN32
/*
* Run execve() inside a fork(). Designed to replicate the semantics of system() but
@@ -503,6 +504,7 @@ openvpn_execve (const struct argv *a, const struct env_set *es, const unsigned i
{
struct gc_arena gc = gc_new ();
int ret = -1;
+ static bool warn_shown = false;
if (a && a->argv[0])
{
@@ -539,9 +541,10 @@ openvpn_execve (const struct argv *a, const struct env_set *es, const unsigned i
ASSERT (0);
}
}
- else
+ else if (!warn_shown && (script_security < SSEC_SCRIPTS))
{
msg (M_WARN, SCRIPT_SECURITY_WARNING);
+ warn_shown = true;
}
#else
msg (M_WARN, "openvpn_execve: execve function not available");
diff --git a/misc.h b/misc.h
index d5ad774..7db9332 100644
--- a/misc.h
+++ b/misc.h
@@ -136,6 +136,15 @@ bool openvpn_execve_check (const struct argv *a, const struct env_set *es, const
bool openvpn_execve_allowed (const unsigned int flags);
int openvpn_system (const char *command, const struct env_set *es, unsigned int flags);
+static inline bool
+openvpn_run_script (const struct argv *a, const struct env_set *es, const unsigned int flags, const char *hook)
+{
+ char msg[256];
+
+ openvpn_snprintf(msg, sizeof(msg), "WARNING: Failed running command (%s)", hook);
+ return openvpn_execve_check(a, es, flags | S_SCRIPT, msg);
+};
+
#ifdef HAVE_STRERROR
/* a thread-safe version of strerror */
const char* strerror_ts (int errnum, struct gc_arena *gc);
@@ -308,6 +317,7 @@ void get_user_pass_auto_userid (struct user_pass *up, const char *tag);
extern const char *iproute_path;
#endif
+/* Script security */
#define SSEC_NONE 0 /* strictly no calling of external programs */
#define SSEC_BUILT_IN 1 /* only call built-in programs such as ifconfig, route, netsh, etc.*/
#define SSEC_SCRIPTS 2 /* allow calling of built-in programs and user-defined scripts */
diff --git a/multi.c b/multi.c
index dc26a02..57310f6 100644
--- a/multi.c
+++ b/multi.c
@@ -109,7 +109,7 @@ learn_address_script (const struct multi_context *m,
mroute_addr_print (addr, &gc));
if (mi)
argv_printf_cat (&argv, "%s", tls_common_name (mi->context.c2.tls_multi, false));
- if (!openvpn_execve_check (&argv, es, S_SCRIPT, "WARNING: learn-address command failed"))
+ if (!openvpn_run_script (&argv, es, 0, "--learn-address"))
ret = false;
argv_reset (&argv);
}
@@ -480,7 +480,7 @@ multi_client_disconnect_script (struct multi_context *m,
struct argv argv = argv_new ();
setenv_str (mi->context.c2.es, "script_type", "client-disconnect");
argv_printf (&argv, "%sc", mi->context.options.client_disconnect_script);
- openvpn_execve_check (&argv, mi->context.c2.es, S_SCRIPT, "client-disconnect command failed");
+ openvpn_run_script (&argv, mi->context.c2.es, 0, "--client-disconnect");
argv_reset (&argv);
}
#ifdef MANAGEMENT_DEF_AUTH
@@ -1594,7 +1594,7 @@ multi_connection_established (struct multi_context *m, struct multi_instance *mi
mi->context.options.client_connect_script,
dc_file);
- if (openvpn_execve_check (&argv, mi->context.c2.es, S_SCRIPT, "client-connect command failed"))
+ if (openvpn_run_script (&argv, mi->context.c2.es, 0, "--client-connect"))
{
multi_client_connect_post (m, mi, dc_file, option_permissions_mask, &option_types_found);
++cc_succeeded_count;
diff --git a/socket.c b/socket.c
index 660e2ac..b02d3da 100644
--- a/socket.c
+++ b/socket.c
@@ -1695,7 +1695,7 @@ link_socket_connection_initiated (const struct buffer *buf,
struct argv argv = argv_new ();
setenv_str (es, "script_type", "ipchange");
ipchange_fmt (true, &argv, info, &gc);
- openvpn_execve_check (&argv, es, S_SCRIPT, "ip-change command failed");
+ openvpn_run_script (&argv, es, 0, "--ipchange");
argv_reset (&argv);
}
diff --git a/ssl.c b/ssl.c
index 5e7debe..71d1f34 100644
--- a/ssl.c
+++ b/ssl.c
@@ -983,7 +983,7 @@ verify_callback (int preverify_ok, X509_STORE_CTX * ctx)
ctx->error_depth,
subject);
argv_msg_prefix (D_TLS_DEBUG, &argv, "TLS: executing verify command");
- ret = openvpn_execve (&argv, opt->es, S_SCRIPT);
+ ret = openvpn_run_script (&argv, opt->es, 0, "--tls-verify script");
if (opt->verify_export_cert)
{
@@ -3344,7 +3344,7 @@ verify_user_pass_script (struct tls_session *session, const struct user_pass *up
argv_printf (&argv, "%sc %s", session->opt->auth_user_pass_verify_script, tmp_file);
/* call command */
- retval = openvpn_execve (&argv, session->opt->es, S_SCRIPT);
+ retval = openvpn_run_script (&argv, session->opt->es, 0, "--auth-user-pass-verify");
/* test return status of command */
if (system_ok (retval))
diff --git a/win32.c b/win32.c
index 2a3350d..7c9901e 100644
--- a/win32.c
+++ b/win32.c
@@ -952,6 +952,8 @@ int
openvpn_execve (const struct argv *a, const struct env_set *es, const unsigned int flags)
{
int ret = -1;
+ static bool exec_warn = false;
+
if (a && a->argv[0])
{
if (openvpn_execve_allowed (flags))
@@ -1002,9 +1004,10 @@ openvpn_execve (const struct argv *a, const struct env_set *es, const unsigned i
ASSERT (0);
}
}
- else
+ else if (!exec_warn && (script_security < SSEC_SCRIPTS))
{
msg (M_WARN, SCRIPT_SECURITY_WARNING);
+ exec_warn = true;
}
}
else
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 09:41:26 +0000