[U-Boot] [PATCH v2 3/5] CVE-2019-14194/CVE-2019-14198: nfs: fix unbounded memcpy with a failed length check at nfs_read_reply //RE: [PATCH 3/5] CVE-2019-14194/CVE-2019-14198: nfs: fix unbounded memcpy with a failed length check at nfs_read_reply

-- 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) liucheng32@huawei.com Subject: [PATCH 3/5] CVE-2019-14194/CVE-2019-14198: nfs: fix unbounded memcpy with a failed length check at nfs_read_reply CVE-2019-14194/CVE-2019-14198: nfs: fix unbounded memcpy with a failed length check at nfs_read_reply This patch adds a check to rpc_pkt.u.reply.data at nfs_read_reply. Signed-off-by: Cheng Liu liucheng32@huawei.com --- net/nfs.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/nfs.c b/net/nfs.c index b7cf3b3..11941fa 100644 --- a/net/nfs.c +++ b/net/nfs.c @@ -701,6 +701,9 @@ static int nfs_read_reply(uchar *pkt, unsigned len) &(rpc_pkt.u.reply.data[4 + nfsv3_data_offset]); } + if (((uchar *)&(rpc_pkt.u.reply.data[0]) - (uchar *)(&rpc_pkt) + rlen) > len) + return -9999; + if (store_block(data_ptr, nfs_offset, rlen)) return -9999; -- 1.8.5.6