From: Alan T. DeKok <aland@freeradius.org>
Date: Thu, 21 Jan 2021 20:29:39 +0000 (-0500)
Subject: header is at least 4 bytes
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=64460cd90227ca22f09acc77ec9a8b8709b0625d;p=thirdparty%2Ffreeradius-server.git

header is at least 4 bytes
---

diff --git a/src/protocols/dhcpv6/base.c b/src/protocols/dhcpv6/base.c
index ed5b4a35fbd..bd2281e6e77 100644
--- a/src/protocols/dhcpv6/base.c
+++ b/src/protocols/dhcpv6/base.c
@@ -637,7 +637,7 @@ ssize_t	fr_dhcpv6_decode(TALLOC_CTX *ctx, uint8_t const *packet, size_t packet_l
 	fr_dhcpv6_decode_ctx_t	packet_ctx;
 	fr_pair_t		*vp;
 
-	if (!packet_len) return 0; /* protect access to packet[0] */
+	if (packet_len < DHCPV6_HDR_LEN) return 0; /* protect access to packet[0] */
 
 	/*
 	 *	Get the packet type.