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Commit fa8f3a35 authored by Stefan Metzmacher's avatar Stefan Metzmacher Committed by Steve French
Browse files

fs/cifs: correctly to anonymous authentication for the LANMAN authentication 

Only server which map unknown users to guest will allow
access using a non-null LMChallengeResponse.

For Samba it's the "map to guest = bad user" option.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=11913



Signed-off-by: default avatarStefan Metzmacher <metze@samba.org>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: default avatarSteve French <smfrench@gmail.com>
parent cfda35d9

fs/cifs/sess.c

+16 −12
Original line number Diff line number Diff line
@@ -678,6 +678,7 @@ sess_auth_lanman(struct sess_data *sess_data) 


	pSMB->req.hdr.Flags2 &= ~SMBFLG2_UNICODE;



	if (ses->user_name != NULL) {

		/* no capabilities flags in old lanman negotiation */

		pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
@@ -692,6 +693,9 @@ sess_auth_lanman(struct sess_data *sess_data) 


		memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_AUTH_RESP_SIZE);

		bcc_ptr += CIFS_AUTH_RESP_SIZE;

	} else {

		pSMB->old_req.PasswordLength = 0;

	}



	/*

	 * can not sign if LANMAN negotiated so no need