From c3588d9c0b5cc1df5f5dd4d52d06be2b5f48fabf Mon Sep 17 00:00:00 2001 From: Sean Bright Date: Mon, 13 Jul 2020 16:42:40 -0400 Subject: [PATCH] acl.c: Coerce a NULL pointer into the empty string If an ACL is misconfigured in the realtime database (for instance, the "rule" is blank) and Asterisk attempts to read the ACL, Asterisk will crash. ASTERISK-28978 #close Change-Id: Ic1536c4df856231bfd2da00128f7822224d77610 --- main/acl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/main/acl.c b/main/acl.c index a560046574..2a40fae51a 100644 --- a/main/acl.c +++ b/main/acl.c @@ -578,7 +578,7 @@ static struct ast_ha *append_ha_core(const char *sense, const char *stuff, struc struct ast_ha *ha; struct ast_ha *prev = NULL; struct ast_ha *ret; - char *tmp, *list = ast_strdupa(stuff); + char *tmp, *list = ast_strdupa(stuff ?: ""); char *address = NULL, *mask = NULL; int addr_is_v4; int allowing = strncasecmp(sense, "p", 1) ? AST_SENSE_DENY : AST_SENSE_ALLOW;