File 0018-CVE-net-fix-unbounded-memcpy-of-UDP.patch of Package u-boot-a20-olinuxino-lime2

Overview Repositories Revisions Requests Users Attributes Meta

File 0018-CVE-net-fix-unbounded-memcpy-of-UDP.patch of Package u-boot-a20-olinuxino-lime2 (Revision 4aec90db10e207322a33b41e4bd45ca3)

Currently displaying revision 4aec90db10e207322a33b41e4bd45ca3 , Show latest

From 4f40ad5f63ca100dc3f0d75bca4287611a7c7514 Mon Sep 17 00:00:00 2001
From: "liucheng (G)" <liucheng32@huawei.com>
Date: Thu, 29 Aug 2019 13:47:33 +0000
Subject: [PATCH] CVE: net: fix unbounded memcpy of UDP packet
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This patch adds a check to udp_len to fix unbounded memcpy for
CVE-2019-14192, CVE-2019-14193 and CVE-2019-14199.

Signed-off-by: Cheng Liu <liucheng32@huawei.com>
Reviewed-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Reported-by: Fermín Serna <fermin@semmle.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
(cherry picked from commit fe7288069d2e6659117049f7d27e261b550bb725)
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
---
 net/net.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/net.c b/net/net.c
index a5a216c3ee..ecc1649d74 100644
--- a/net/net.c
+++ b/net/net.c
@@ -1258,6 +1258,9 @@ void net_process_received_packet(uchar *in_packet, int len)
 			return;
 		}
 
+		if (ntohs(ip->udp_len) < UDP_HDR_SIZE || ntohs(ip->udp_len) > ntohs(ip->ip_len))
+			return;
+
 		debug_cond(DEBUG_DEV_PKT,
 			   "received UDP (to=%pI4, from=%pI4, len=%d)\n",
 			   &dst_ip, &src_ip, len);

Places

File 0018-CVE-net-fix-unbounded-memcpy-of-UDP.patch of Package u-boot-a20-olinuxino-lime2 (Revision 4aec90db10e207322a33b41e4bd45ca3)

Places