From f306e451f6f905a2bb74c15cb844735c244a7610 Mon Sep 17 00:00:00 2001 From: Sean Bright Date: Tue, 23 May 2017 14:06:22 -0400 Subject: [PATCH] res_agi: Prevent crash when SET VARIABLE called without arguments Explicitly check that the appropriate number of arguments were passed to SET VARIABLE before attempting to reference them. Also initialize the arguments array to zeroes before populating it. ASTERISK-22432 #close Change-Id: I5143607d80a2724f749c1674f3126b04ed32ea97 --- res/res_agi.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/res/res_agi.c b/res/res_agi.c index cd0d621eb1..bbb41d879d 100644 --- a/res/res_agi.c +++ b/res/res_agi.c @@ -3185,6 +3185,10 @@ static int handle_channelstatus(struct ast_channel *chan, AGI *agi, int argc, co static int handle_setvariable(struct ast_channel *chan, AGI *agi, int argc, const char * const argv[]) { + if (argc != 4) { + return RESULT_SHOWUSAGE; + } + if (argv[3]) pbx_builtin_setvar_helper(chan, argv[2], argv[3]); @@ -4003,7 +4007,7 @@ static void publish_async_exec_end(struct ast_channel *chan, int command_id, con static enum agi_result agi_handle_command(struct ast_channel *chan, AGI *agi, char *buf, int dead) { - const char *argv[MAX_ARGS]; + const char *argv[MAX_ARGS] = {0}; int argc = MAX_ARGS; int res; agi_command *c; -- 2.47.2