From aa207cf3a6d68f39d64cd29057a4fb63943e9078 Mon Sep 17 00:00:00 2001 From: "liucheng (G)" Date: Thu, 29 Aug 2019 13:47:48 +0000 Subject: CVE-2019-14194/CVE-2019-14198: nfs: fix unbounded memcpy with a failed length check at nfs_read_reply MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This patch adds a check to rpc_pkt.u.reply.data at nfs_read_reply. Signed-off-by: Cheng Liu Reported-by: Fermín Serna Acked-by: Joe Hershberger --- net/nfs.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'net') 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; -- cgit v1.1