| Brad Bishop | 00e122a | 2019-10-05 11:10:57 -0400 | [diff] [blame^] | 1 | From e8e602f4a4b2aacfb3da32bb8a838be15ea70e7b Mon Sep 17 00:00:00 2001 |
| 2 | From: "liucheng (G)" <liucheng32@huawei.com> |
| 3 | Date: Thu, 29 Aug 2019 13:47:33 +0000 |
| 4 | Subject: [PATCH 5/9] CVE: net: fix unbounded memcpy of UDP packet |
| 5 | MIME-Version: 1.0 |
| 6 | Content-Type: text/plain; charset=UTF-8 |
| 7 | Content-Transfer-Encoding: 8bit |
| 8 | |
| 9 | This patch adds a check to udp_len to fix unbounded memcpy for |
| 10 | CVE-2019-14192, CVE-2019-14193 and CVE-2019-14199. |
| 11 | |
| 12 | Signed-off-by: Cheng Liu <liucheng32@huawei.com> |
| 13 | Reviewed-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com> |
| 14 | Reported-by: Fermín Serna <fermin@semmle.com> |
| 15 | Acked-by: Joe Hershberger <joe.hershberger@ni.com> |
| 16 | |
| 17 | Upstream-Status: Backport[http://git.denx.de/?p=u-boot.git;a=commit; |
| 18 | h=fe7288069d2e6659117049f7d27e261b550bb725] |
| 19 | |
| 20 | CVE: CVE-2019-14192, CVE-2019-14193 and CVE-2019-14199 |
| 21 | |
| 22 | Signed-off-by: Meng Li <Meng.Li@windriver.com> |
| 23 | --- |
| 24 | net/net.c | 3 +++ |
| 25 | 1 file changed, 3 insertions(+) |
| 26 | |
| 27 | diff --git a/net/net.c b/net/net.c |
| 28 | index 58b0417cbe..38105f1142 100644 |
| 29 | --- a/net/net.c |
| 30 | +++ b/net/net.c |
| 31 | @@ -1252,6 +1252,9 @@ void net_process_received_packet(uchar *in_packet, int len) |
| 32 | return; |
| 33 | } |
| 34 | |
| 35 | + if (ntohs(ip->udp_len) < UDP_HDR_SIZE || ntohs(ip->udp_len) > ntohs(ip->ip_len)) |
| 36 | + return; |
| 37 | + |
| 38 | debug_cond(DEBUG_DEV_PKT, |
| 39 | "received UDP (to=%pI4, from=%pI4, len=%d)\n", |
| 40 | &dst_ip, &src_ip, len); |
| 41 | -- |
| 42 | 2.17.1 |
| 43 | |