app_confbridge: Correct verification of conference name length

Conference names were not checked for maximum length, allowing unexpected
behaviour.  This change adds checking to ensure the maximum length is not
exceeded.  The maximum length is also changed from 32 to AST_MAX_EXTENSION.

ASTERISK-23035 #close
Reported by: Iñaki Cívico
Tested by: Iñaki Cívico
Patches:
    confbridge-enforce_max-1.8.patch uploaded by coreyfarrell (license 5909)
    confbridge-enforce_max-11up.patch uploaded by coreyfarrell (license 5909)
........

Merged revisions 415060 from http://svn.asterisk.org/svn/asterisk/branches/1.8
........

Merged revisions 415066 from http://svn.asterisk.org/svn/asterisk/branches/11

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/12@415078 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/apps/app_confbridge.c b/apps/app_confbridge.c
index 79d9fb542092190e49138ca8b4b71e47c46785f6..2c84e8a3491bbc16227993ae9e1a135d990f87ea 100644 (file)
--- a/apps/app_confbridge.c
+++ b/apps/app_confbridge.c
@@ -1567,16 +1567,22 @@ static int confbridge_exec(struct ast_channel *chan, const char *data)
                goto confbridge_cleanup;
        }
 
-       if (ast_strlen_zero(data)) {
+       /* We need to make a copy of the input string if we are going to modify it! */
+       parse = ast_strdupa(data);
+
+       AST_STANDARD_APP_ARGS(args, parse);
+
+       if (ast_strlen_zero(args.conf_name)) {
                ast_log(LOG_WARNING, "%s requires an argument (conference name[,options])\n", app);
                res = -1;
                goto confbridge_cleanup;
        }
 
-       /* We need to make a copy of the input string if we are going to modify it! */
-       parse = ast_strdupa(data);
-
-       AST_STANDARD_APP_ARGS(args, parse);
+       if (strlen(args.conf_name) >= MAX_CONF_NAME) {
+               ast_log(LOG_WARNING, "%s does not accept conference names longer than %d\n", app, MAX_CONF_NAME - 1);
+               res = -1;
+               goto confbridge_cleanup;
+       }
 
        /* bridge profile name */
        if (args.argc > 1 && !ast_strlen_zero(args.b_profile_name)) {

diff --git a/apps/confbridge/include/confbridge.h b/apps/confbridge/include/confbridge.h
index 932fdad5cce9f53d16d1b5b21017c14354fd8178..9aa1d7722a540cf828cef7afa838ccb02828b205 100644 (file)
--- a/apps/confbridge/include/confbridge.h
+++ b/apps/confbridge/include/confbridge.h
@@ -31,7 +31,7 @@
 #include "conf_state.h"
 
 /* Maximum length of a conference bridge name */
-#define MAX_CONF_NAME 32
+#define MAX_CONF_NAME AST_MAX_EXTENSION
 /* Maximum length of a conference pin */
 #define MAX_PIN     80