From 163c4ef809bae670524df2d55e24635dd78bfd34 Mon Sep 17 00:00:00 2001
From: Hans Dedecker <dedeckeh@gmail.com>
Date: Fri, 27 Dec 2013 15:55:24 +0100
Subject: [PATCH] Drop DHCPv6 messages containing invalid option length

---
 src/dhcpv6.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/dhcpv6.c b/src/dhcpv6.c
index cd8e438..8d65219 100644
--- a/src/dhcpv6.c
+++ b/src/dhcpv6.c
@@ -623,7 +623,7 @@ static bool dhcpv6_response_is_valid(const void *buf, ssize_t len,
 		}
 	}
 
-	if (!options_valid)
+	if (!options_valid || ((odata + olen) > end))
 		return false;
 
 	if (type == DHCPV6_MSG_INFO_REQ && ia_present)
-- 
2.39.2