lkml.org 
[lkml]   [2016]   [Jul]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 3.19.y-ckt 75/99] fs/cifs: correctly to anonymous authentication for the NTLM(v1) authentication
    Date
    3.19.8-ckt23 -stable review patch.  If anyone has any objections, please let me know.

    ---8<------------------------------------------------------------

    From: Stefan Metzmacher <metze@samba.org>

    commit 777f69b8d26bf35ade4a76b08f203c11e048365d upstream.

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

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

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

    Signed-off-by: Stefan Metzmacher <metze@samba.org>
    Signed-off-by: Steve French <smfrench@gmail.com>
    Signed-off-by: Kamal Mostafa <kamal@canonical.com>
    ---
    fs/cifs/sess.c | 41 +++++++++++++++++++++++------------------
    1 file changed, 23 insertions(+), 18 deletions(-)

    diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
    index 91dbaca..a58b100 100644
    --- a/fs/cifs/sess.c
    +++ b/fs/cifs/sess.c
    @@ -781,26 +781,31 @@ sess_auth_ntlm(struct sess_data *sess_data)
    capabilities = cifs_ssetup_hdr(ses, pSMB);

    pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
    - pSMB->req_no_secext.CaseInsensitivePasswordLength =
    - cpu_to_le16(CIFS_AUTH_RESP_SIZE);
    - pSMB->req_no_secext.CaseSensitivePasswordLength =
    - cpu_to_le16(CIFS_AUTH_RESP_SIZE);
    + if (ses->user_name != NULL) {
    + pSMB->req_no_secext.CaseInsensitivePasswordLength =
    + cpu_to_le16(CIFS_AUTH_RESP_SIZE);
    + pSMB->req_no_secext.CaseSensitivePasswordLength =
    + cpu_to_le16(CIFS_AUTH_RESP_SIZE);

    - /* calculate ntlm response and session key */
    - rc = setup_ntlm_response(ses, sess_data->nls_cp);
    - if (rc) {
    - cifs_dbg(VFS, "Error %d during NTLM authentication\n",
    - rc);
    - goto out;
    - }
    + /* calculate ntlm response and session key */
    + rc = setup_ntlm_response(ses, sess_data->nls_cp);
    + if (rc) {
    + cifs_dbg(VFS, "Error %d during NTLM authentication\n",
    + rc);
    + goto out;
    + }

    - /* copy ntlm response */
    - memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
    - CIFS_AUTH_RESP_SIZE);
    - bcc_ptr += CIFS_AUTH_RESP_SIZE;
    - memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
    - CIFS_AUTH_RESP_SIZE);
    - bcc_ptr += CIFS_AUTH_RESP_SIZE;
    + /* copy ntlm response */
    + memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
    + CIFS_AUTH_RESP_SIZE);
    + bcc_ptr += CIFS_AUTH_RESP_SIZE;
    + memcpy(bcc_ptr, ses->auth_key.response + CIFS_SESS_KEY_SIZE,
    + CIFS_AUTH_RESP_SIZE);
    + bcc_ptr += CIFS_AUTH_RESP_SIZE;
    + } else {
    + pSMB->req_no_secext.CaseInsensitivePasswordLength = 0;
    + pSMB->req_no_secext.CaseSensitivePasswordLength = 0;
    + }

    if (ses->capabilities & CAP_UNICODE) {
    /* unicode strings must be word aligned */
    --
    2.7.4
    \
     
     \ /
      Last update: 2016-07-07 21:41    [W:4.051 / U:0.072 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site