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authordjm@openbsd.org <djm@openbsd.org>2020-05-27 22:37:53 +0000
committerDarren Tucker <dtucker@dtucker.net>2020-05-28 10:25:18 +1000
commit7af1e92cd289b7eaa9a683e9a6f2fddd98f37a01 (patch)
tree1f3081c6d2893ca6f1f90f1f9ff7463fcda70d51 /servconf.c
parent0a9a611619b0a1fecd0195ec86a9885f5d681c84 (diff)
upstream: fix Include before Match in sshd_config; bz#3122 patch
from Jakub Jelen OpenBSD-Commit-ID: 1b0aaf135fe6732b5d326946042665dd3beba5f4
Diffstat (limited to 'servconf.c')
-rw-r--r--servconf.c31
1 files changed, 21 insertions, 10 deletions
diff --git a/servconf.c b/servconf.c
index 391f4e82..bd8df7fc 100644
--- a/servconf.c
+++ b/servconf.c
@@ -1,5 +1,5 @@
-/* $OpenBSD: servconf.c,v 1.364 2020/05/27 21:59:11 djm Exp $ */
+/* $OpenBSD: servconf.c,v 1.365 2020/05/27 22:37:53 djm Exp $ */
/*
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
* All rights reserved
@@ -550,6 +550,7 @@ typedef enum {
#define SSHCFG_MATCH 0x02 /* allowed inside a Match section */
#define SSHCFG_ALL (SSHCFG_GLOBAL|SSHCFG_MATCH)
#define SSHCFG_NEVERMATCH 0x04 /* Match never matches; internal only */
+#define SSHCFG_MATCH_ONLY 0x08 /* Match only in conditional blocks; internal only */
/* Textual representation of the tokens. */
static struct {
@@ -1259,7 +1260,7 @@ static const struct multistate multistate_tcpfwd[] = {
static int
process_server_config_line_depth(ServerOptions *options, char *line,
const char *filename, int linenum, int *activep,
- struct connection_info *connectinfo, int inc_flags, int depth,
+ struct connection_info *connectinfo, int *inc_flags, int depth,
struct include_list *includes)
{
char ch, *cp, ***chararrayptr, **charptr, *arg, *arg2, *p;
@@ -2002,7 +2003,9 @@ process_server_config_line_depth(ServerOptions *options, char *line,
parse_server_config_depth(options,
item->filename, item->contents,
includes, connectinfo,
- (oactive ? 0 : SSHCFG_NEVERMATCH),
+ (*inc_flags & SSHCFG_MATCH_ONLY
+ ? SSHCFG_MATCH_ONLY : (oactive
+ ? 0 : SSHCFG_NEVERMATCH)),
activep, depth + 1);
}
found = 1;
@@ -2050,7 +2053,9 @@ process_server_config_line_depth(ServerOptions *options, char *line,
parse_server_config_depth(options,
item->filename, item->contents,
includes, connectinfo,
- (oactive ? 0 : SSHCFG_NEVERMATCH),
+ (*inc_flags & SSHCFG_MATCH_ONLY
+ ? SSHCFG_MATCH_ONLY : (oactive
+ ? 0 : SSHCFG_NEVERMATCH)),
activep, depth + 1);
*activep = oactive;
TAILQ_INSERT_TAIL(includes, item, entry);
@@ -2068,11 +2073,14 @@ process_server_config_line_depth(ServerOptions *options, char *line,
if (cmdline)
fatal("Match directive not supported as a command-line "
"option");
- value = match_cfg_line(&cp, linenum, connectinfo);
+ value = match_cfg_line(&cp, linenum,
+ (*inc_flags & SSHCFG_NEVERMATCH ? NULL : connectinfo));
if (value < 0)
fatal("%s line %d: Bad Match condition", filename,
linenum);
- *activep = (inc_flags & SSHCFG_NEVERMATCH) ? 0 : value;
+ *activep = (*inc_flags & SSHCFG_NEVERMATCH) ? 0 : value;
+ /* The MATCH_ONLY is applicable only until the first match block */
+ *inc_flags &= ~SSHCFG_MATCH_ONLY;
break;
case sPermitListen:
@@ -2375,8 +2383,10 @@ process_server_config_line(ServerOptions *options, char *line,
const char *filename, int linenum, int *activep,
struct connection_info *connectinfo, struct include_list *includes)
{
+ int inc_flags = 0;
+
return process_server_config_line_depth(options, line, filename,
- linenum, activep, connectinfo, 0, 0, includes);
+ linenum, activep, connectinfo, &inc_flags, 0, includes);
}
@@ -2581,14 +2591,15 @@ parse_server_config_depth(ServerOptions *options, const char *filename,
if (depth < 0 || depth > SERVCONF_MAX_DEPTH)
fatal("Too many recursive configuration includes");
- debug2("%s: config %s len %zu", __func__, filename, sshbuf_len(conf));
+ debug2("%s: config %s len %zu%s", __func__, filename, sshbuf_len(conf),
+ (flags & SSHCFG_NEVERMATCH ? " [checking syntax only]" : ""));
if ((obuf = cbuf = sshbuf_dup_string(conf)) == NULL)
fatal("%s: sshbuf_dup_string failed", __func__);
linenum = 1;
while ((cp = strsep(&cbuf, "\n")) != NULL) {
if (process_server_config_line_depth(options, cp,
- filename, linenum++, activep, connectinfo, flags,
+ filename, linenum++, activep, connectinfo, &flags,
depth, includes) != 0)
bad_options++;
}
@@ -2605,7 +2616,7 @@ parse_server_config(ServerOptions *options, const char *filename,
{
int active = connectinfo ? 0 : 1;
parse_server_config_depth(options, filename, conf, includes,
- connectinfo, 0, &active, 0);
+ connectinfo, (connectinfo ? SSHCFG_MATCH_ONLY : 0), &active, 0);
process_queued_listen_addrs(options);
}