[U-Boot] [PATCH v2 2/5] CVE: nfs: fix stack-based buffer overflow in some nfs_handler reply helper functions //RE: [PATCH 2/5] CVE: nfs: fix stack-based buffer overflow in some nfs_handler reply helper functions

[liucheng (G)]

Changes in v2:
- Add reported-by tag for patch 2/5
--------------------------------------------------------------------------------------------------------------
CVE: nfs: fix stack-based buffer overflow in some nfs_handler reply helper 
functions

This patch adds a check to nfs_handler to fix buffer overflow for 
CVE-2019-14197,
CVE-2019-14200, CVE-2019-14201, CVE-2019-14202, CVE-2019-14203 and 
CVE-2019-14204.

Signed-off-by: Cheng Liu <liuchen...@huawei.com>
Reported-by: Fermín Serna <fer...@semmle.com>
---
 net/nfs.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/nfs.c b/net/nfs.c
index d6a7f8e..b7cf3b3 100644
--- a/net/nfs.c
+++ b/net/nfs.c
@@ -732,6 +732,9 @@ static void nfs_handler(uchar *pkt, unsigned dest, struct 
in_addr sip,
 
        debug("%s\n", __func__);
 
+       if (len > sizeof(struct rpc_t))
+               return;
+
        if (dest != nfs_our_port)
                return;
 
-- 
1.8.5.6

-----Original Message-----
From: liucheng (G) 
Sent: Wednesday, August 21, 2019 10:48 PM
To: u-boot@lists.denx.de
Cc: liucheng (G) <liuchen...@huawei.com>
Subject: [PATCH 2/5] CVE: nfs: fix stack-based buffer overflow in some 
nfs_handler reply helper functions

CVE: nfs: fix stack-based buffer overflow in some nfs_handler reply helper 
functions

This patch adds a check to nfs_handler to fix buffer overflow for 
CVE-2019-14197,
CVE-2019-14200, CVE-2019-14201, CVE-2019-14202, CVE-2019-14203 and 
CVE-2019-14204.

Signed-off-by: Cheng Liu <liuchen...@huawei.com>
---
 net/nfs.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/nfs.c b/net/nfs.c
index d6a7f8e..b7cf3b3 100644
--- a/net/nfs.c
+++ b/net/nfs.c
@@ -732,6 +732,9 @@ static void nfs_handler(uchar *pkt, unsigned dest, struct 
in_addr sip,
 
        debug("%s\n", __func__);
 
+       if (len > sizeof(struct rpc_t))
+               return;
+
        if (dest != nfs_our_port)
                return;
 
-- 
1.8.5.6

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