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-rw-r--r--source4/smb_server/smb2/fileio.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/source4/smb_server/smb2/fileio.c b/source4/smb_server/smb2/fileio.c
index 2c322ea587..4f4402ba33 100644
--- a/source4/smb_server/smb2/fileio.c
+++ b/source4/smb_server/smb2/fileio.c
@@ -254,6 +254,12 @@ void smb2srv_read_recv(struct smb2srv_request *req)
union smb_read *io;
SMB2SRV_CHECK_BODY_SIZE(req, 0x30, true);
+
+ /* MS-SMB2 2.2.19 read must have a single byte of zero */
+ if (req->in.body_size - req->in.body_fixed < 1) {
+ smb2srv_send_error(req, NT_STATUS_INVALID_PARAMETER);
+ return;
+ }
SMB2SRV_TALLOC_IO_PTR(io, union smb_read);
SMB2SRV_SETUP_NTVFS_REQUEST(smb2srv_read_send, NTVFS_ASYNC_STATE_MAY_ASYNC);