iOS SMB auth failing

[SurprisingEdge]

For the last few days (maybe since an auto update?) the SMB auth has been failing between VLC and a Linux Samba server accessible on my wifi. On my iPhone, iPad, and AppleTV. Meanwhile, my Windows 10 machines connect and browse fine.
I've verified multiple times that I'm entering the correct password, including changing it to "test". I've verified it's using NTLMv2... all the usual stuff.
Running `smbclient -U redacted \\\\servername\\sharename` from the Linux server connects fine too.
In the Samba logs I see this when I try to connect with VLC:

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[2020/10/06 10:47:57.614698, 2] ../../source3/auth/auth.c:343(auth_check_ntlm_password) check_ntlm_password: Authentication for user [redacted] -> [redacted] FAILED with error NT_STATUS_WRONG_PASSWORD, authoritative=1 [2020/10/06 10:47:57.614785, 2] ../../auth/auth_log.c:635(log_authentication_event_human_readable) Auth: [SMB2,(null)] user [WORKGROUP]\[redacted] at [Tue, 06 Oct 2020 10:47:57.614765 PDT] with [NTLMv2] status [NT_STATUS_WRONG_PASSWORD] workstation [] remote host [ipv4:192.168.1.71:49397] mapped to [WORKGROUP]\[redacted]. local host [ipv4:192.168.1.200:445] {"timestamp": "2020-10-06T10:47:57.614910-0700", "type": "Authentication", "Authentication": {"version": {"major": 1, "minor": 2}, "eventId": 4625, "logonId": "0", "logonType": 3, "status": "NT_STATUS_WRONG_PASSWORD", "localAddress": "ipv4:192.168.1.200:445", "remoteAddress": "ipv4:192.168.1.71:49397", "serviceDescription": "SMB2", "authDescription": null, "clientDomain": "WORKGROUP", "clientAccount": "redacted", "workstation": "", "becameAccount": null, "becameDomain": null, "becameSid": null, "mappedAccount": "redacted", "mappedDomain": "WORKGROUP", "netlogonComputer": null, "netlogonTrustAccount": null, "netlogonNegotiateFlags": "0x00000000", "netlogonSecureChannelType": 0, "netlogonTrustAccountSid": null, "passwordType": "NTLMv2", "duration": 18654}}

Any ideas? It's almost as if VLC isn't sending the password correctly, but I don't know how I could verify that.

[iEuropa]

Hello,

I have indeed noticed some problems with SMB using VLC on an iPad Pro 2020. When I try to connect to a server, the spinning wheel keeps spinning and nothing happens.

I took a look at it with Wireshark and it turns out that the connection process doesn't succeed, and I also think it's because the password is not transmitted correctly. The security blob seems to be lacking some data and apparently DFS is not enabled (which it should)/

[fkuehne]

Thanks a lot for providing those details. We will look into it!

Just to make extra sure: which SMB version is enabled on your Linux computers? 1, 2 or 3?

[SurprisingEdge]

I’m not entirely sure. How would I check?
(It’s a fairly default Ubuntu install of samba from about a year ago, so whatever the defaults are. I’d expect they’re pretty modern.)
I didn’t explicitly mention, but this had been working fine for ages, and stopped working roughly a week ago, give or take a few days. I didn’t change anything on the server, or my network. (Though I know that doesn’t always mean anything.) I noticed that VLC auto updated on my phone around the same time though.

[fkuehne]

We discovered that this problem affects SMBv2, which is the default configuration for Samba on Linux and various NAS devices. We are working on a fix. SMBv1 will work fine but is discouraged for security reasons.

[LesBed]

I have problem too with my iphone (ios 14) and i cant connect to my windows 10 with smb share. Popup appear to enter credential!

I didnt do the update on My older ipad , and it work fine!

[djuleb83]

Hello,
same problem here.
VLC for Mobile 3.2.12 - on iPad Pro A1701, iOS 13.7 // SMB share on Windows 10 Pro 1909 (access with credentials),
Even with SMBv1 feature enabled on Win10, the spinning wheel keeps spinning and nothing happens..
was working fine before last update, other apps and iOS explorer can see the share correctly
Best Regards.

[fkuehne]

Hello,

There is a pre-release version available on TestFlight right now that you can download and install to verify that the problem is resolved: https://testflight.apple.com/join/bbyXP6Lx

Thanks!

[SurprisingEdge]

The TestFlight version doesn’t seem to fix it for me. I’ll try to grab logs later when I have time.

[Vsh123]

Felix,
So you know, and I will post under my thread as well, 3.2.13 does allow us to log into Box and view/work with files.
I am ready to see it in the App Store

[SurprisingEdge]

This is what I'm getting on the server now, with the TestFlight version of the app. Looks like the same error, but maybe something's different. All the "redacted" are the same thing, my samba username.

This is what I get when I enter the correct password:

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check_ntlm_password: Authentication for user [redacted] -> [redacted] FAILED with error NT_STATUS_WRONG_PASSWORD, authoritative=1 [2020/10/10 17:35:52.131460, 2] ../../auth/auth_log.c:635(log_authentication_event_human_readable) Auth: [SMB2,(null)] user [WORKGROUP]\[redacted] at [Sat, 10 Oct 2020 17:35:52.131447 PDT] with [NTLMv2] status [NT_STATUS_WRONG_PASSWORD] workstation [] remote host [ipv4:192.168.1.78:53073] mapped to [WORKGROUP]\[redacted]. local host [ipv4:192.168.1.200:445] {"timestamp": "2020-10-10T17:35:52.131549-0700", "type": "Authentication", "Authentication": {"version": {"major": 1, "minor": 2}, "eventId": 4625, "logonId": "0", "logonType": 3, "status": "NT_STATUS_WRONG_PASSWORD", "localAddress": "ipv4:192.168.1.200:445", "remoteAddress": "ipv4:192.168.1.78:53073", "serviceDescription": "SMB2", "authDescription": null, "clientDomain": "WORKGROUP", "clientAccount": "redacted", "workstation": "", "becameAccount": null, "becameDomain": null, "becameSid": null, "mappedAccount": "redacted", "mappedDomain": "WORKGROUP", "netlogonComputer": null, "netlogonTrustAccount": null, "netlogonNegotiateFlags": "0x00000000", "netlogonSecureChannelType": 0, "netlogonTrustAccountSid": null, "passwordType": "NTLMv2", "duration": 17449}}

And this when I enter the wrong password:

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check_ntlm_password: Authentication for user [redacted] -> [redacted] FAILED with error NT_STATUS_WRONG_PASSWORD, authoritative=1 [2020/10/10 17:37:42.533430, 2] ../../auth/auth_log.c:635(log_authentication_event_human_readable) Auth: [SMB2,(null)] user [WORKGROUP]\[redacted] at [Sat, 10 Oct 2020 17:37:42.533414 PDT] with [NTLMv2] status [NT_STATUS_WRONG_PASSWORD] workstation [] remote host [ipv4:192.168.1.78:53075] mapped to [WORKGROUP]\[redacted]. local host [ipv4:192.168.1.200:445] {"timestamp": "2020-10-10T17:37:42.533517-0700", "type": "Authentication", "Authentication": {"version": {"major": 1, "minor": 2}, "eventId": 4625, "logonId": "0", "logonType": 3, "status": "NT_STATUS_WRONG_PASSWORD", "localAddress": "ipv4:192.168.1.200:445", "remoteAddress": "ipv4:192.168.1.78:53075", "serviceDescription": "SMB2", "authDescription": null, "clientDomain": "WORKGROUP", "clientAccount": "redacted", "workstation": "", "becameAccount": null, "becameDomain": null, "becameSid": null, "mappedAccount": "redacted", "mappedDomain": "WORKGROUP", "netlogonComputer": null, "netlogonTrustAccount": null, "netlogonNegotiateFlags": "0x00000000", "netlogonSecureChannelType": 0, "netlogonTrustAccountSid": null, "passwordType": "NTLMv2", "duration": 18996}}

They look the same to me, which makes me think there's something wrong with how VLC is sending the password?

[tguillem]

I’m not entirely sure. How would I check?
(It’s a fairly default Ubuntu install of samba from about a year ago, so whatever the defaults are. I’d expect they’re pretty modern.)
I didn’t explicitly mention, but this had been working fine for ages, and stopped working roughly a week ago, give or take a few days. I didn’t change anything on the server, or my network. (Though I know that doesn’t always mean anything.) I noticed that VLC auto updated on my phone around the same time though.

So, we just fixed a login issue with SMBv3, but it doesn't seem to be related to your issue, since your installation is one year old.

Could you help us by giving us the following ?
- Your exact Ubuntu version
- The result of "apt show samba"
- The result of "cat /etc/samba/smb.conf"

[ane_video]

Hi Thomas,
I'm having the same problem. It worked fine yesterday, then the iPad rebooted (I assume it might have updated VLC after that) and it failed. I tried the build you linked and I got the same error as before.

I am running Samba 4.13.0 on Gentoo. I haven't changed any of the default parameters, this is my config after stripping out comments:

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[global] access based share enum = yes workgroup = MYGROUP server string = Samba Server server role = standalone server max log size = 50 dns proxy = no [data] valid users = xxx public = no writable = yes path = /mnt/data

I can provide complete logs and/or a PCAP in PM if you'd like.

[SurprisingEdge]

So, we just fixed a login issue with SMBv3, but it doesn't seem to be related to your issue, since your installation is one year old.

Could you help us by giving us the following ?
- Your exact Ubuntu version
- The result of "apt show samba"
- The result of "cat /etc/samba/smb.conf"

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$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 20.04 LTS Release: 20.04 Codename: focal

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$ apt show samba Package: samba Version: 2:4.11.6+dfsg-0ubuntu1.5 Priority: optional Section: net Origin: Ubuntu Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com> Original-Maintainer: Debian Samba Maintainers <pkg-samba-maint@lists.alioth.debian.org> Bugs: https://bugs.launchpad.net/ubuntu/+filebug Installed-Size: 16.6 MB Pre-Depends: dpkg (>= 1.15.6~), init-system-helpers (>= 1.54~) Depends: adduser, libpam-modules, libpam-runtime (>= 1.0.1-11), lsb-base (>= 4.1+Debian), procps, python3 (<< 3.9), python3-dnspython, python3-samba, samba-common (= 2:4.11.6+dfsg-0ubuntu1.5), samba-common-bin (= 2:4.11.6+dfsg-0ubuntu1.5), tdb-tools, python3 (>= 3.8~), python3:any, libbsd0 (>= 0.6.0), libc6 (>= 2.14), libgnutls30 (>= 3.6.12), libldb2 (>= 2:2.0.10~), libpopt0 (>= 1.14), libpython3.8 (>= 3.8.2), libtalloc2 (>= 2.2.0~), libtasn1-6 (>= 4.14), libtdb1 (>= 1.4.2~), libtevent0 (>= 0.10.0~), libwbclient0 (= 2:4.11.6+dfsg-0ubuntu1.5), samba-libs (= 2:4.11.6+dfsg-0ubuntu1.5) Recommends: attr, logrotate, python3-markdown, samba-dsdb-modules, samba-vfs-modules Suggests: bind9 (>= 1:9.5.1), bind9utils, ctdb, ldb-tools, ntp | chrony (>= 3.0-1), smbldap-tools, ufw, winbind Enhances: bind9, ntp Homepage: http://www.samba.org Task: samba-server Download-Size: 971 kB APT-Manual-Installed: yes APT-Sources: http://ca.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages Description: SMB/CIFS file, print, and login server for Unix Samba is an implementation of the SMB/CIFS protocol for Unix systems, providing support for cross-platform file and printer sharing with Microsoft Windows, OS X, and other Unix systems. Samba can also function as an NT4-style domain controller, and can integrate with both NT4 domains and Active Directory realms as a member server. . This package provides the components necessary to use Samba as a stand-alone file and print server or as an NT4 or Active Directory domain controller. For use in an NT4 domain or Active Directory realm, you will also need the winbind package. . This package is not required for connecting to existing SMB/CIFS servers (see smbclient) or for mounting remote filesystems (see cifs-utils). N: There is 1 additional record. Please use the '-a' switch to see it

[SurprisingEdge]

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$ cat /etc/samba/smb.conf # # Sample configuration file for the Samba suite for Debian GNU/Linux. # # # This is the main Samba configuration file. You should read the # smb.conf(5) manual page in order to understand the options listed # here. Samba has a huge number of configurable options most of which # are not shown in this example # # Some options that are often worth tuning have been included as # commented-out examples in this file. # - When such options are commented with ";", the proposed setting # differs from the default Samba behaviour # - When commented with "#", the proposed setting is the default # behaviour of Samba but the option is considered important # enough to be mentioned here # # NOTE: Whenever you modify this file you should run the command # "testparm" to check that you have not made any basic syntactic # errors. #======================= Global Settings ======================= [global] ## Browsing/Identification ### # Change this to the workgroup/NT-domain name your Samba server will part of workgroup = WORKGROUP # server string is the equivalent of the NT Description field server string = %h server (Samba, Ubuntu) #### Networking #### # The specific set of interfaces / networks to bind to # This can be either the interface name or an IP address/netmask; # interface names are normally preferred ; interfaces = 127.0.0.0/8 eth0 # Only bind to the named interfaces and/or networks; you must use the # 'interfaces' option above to use this. # It is recommended that you enable this feature if your Samba machine is # not protected by a firewall or is a firewall itself. However, this # option cannot handle dynamic or non-broadcast interfaces correctly. ; bind interfaces only = yes #### Debugging/Accounting #### # This tells Samba to use a separate log file for each machine # that connects log file = /var/log/samba/log.%m # Cap the size of the individual log files (in KiB). max log size = 1000 # We want Samba to only log to /var/log/samba/log.{smbd,nmbd}. # Append syslog@1 if you want important messages to be sent to syslog too. logging = file # Do something sensible when Samba crashes: mail the admin a backtrace panic action = /usr/share/samba/panic-action %d log level = 2 ####### Authentication ####### # Server role. Defines in which mode Samba will operate. Possible # values are "standalone server", "member server", "classic primary # domain controller", "classic backup domain controller", "active # directory domain controller". # # Most people will want "standalone server" or "member server". # Running as "active directory domain controller" will require first # running "samba-tool domain provision" to wipe databases and create a # new domain. server role = standalone server obey pam restrictions = yes # This boolean parameter controls whether Samba attempts to sync the Unix # password with the SMB password when the encrypted SMB password in the # passdb is changed. unix password sync = yes # For Unix password sync to work on a Debian GNU/Linux system, the following # parameters must be set (thanks to Ian Kahan <<kahan@informatik.tu-muenchen.de> for # sending the correct chat script for the passwd program in Debian Sarge). passwd program = /usr/bin/passwd %u passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* . # This boolean controls whether PAM will be used for password changes # when requested by an SMB client instead of the program listed in # 'passwd program'. The default is 'no'. pam password change = yes # This option controls how unsuccessful authentication attempts are mapped # to anonymous connections map to guest = bad user ########## Domains ########### # # The following settings only takes effect if 'server role = primary # classic domain controller', 'server role = backup domain controller' # or 'domain logons' is set # # It specifies the location of the user's # profile directory from the client point of view) The following # required a [profiles] share to be setup on the samba server (see # below) ; logon path = \\%N\profiles\%U # Another common choice is storing the profile in the user's home directory # (this is Samba's default) # logon path = \\%N\%U\profile # The following setting only takes effect if 'domain logons' is set # It specifies the location of a user's home directory (from the client # point of view) ; logon drive = H: # logon home = \\%N\%U # The following setting only takes effect if 'domain logons' is set # It specifies the script to run during logon. The script must be stored # in the [netlogon] share # NOTE: Must be store in 'DOS' file format convention ; logon script = logon.cmd # This allows Unix users to be created on the domain controller via the SAMR # RPC pipe. The example command creates a user account with a disabled Unix # password; please adapt to your needs ; add user script = /usr/sbin/adduser --quiet --disabled-password --gecos "" %u # This allows machine accounts to be created on the domain controller via the # SAMR RPC pipe. # The following assumes a "machines" group exists on the system ; add machine script = /usr/sbin/useradd -g machines -c "%u machine account" -d /var/lib/samba -s /bin/false %u # This allows Unix groups to be created on the domain controller via the SAMR # RPC pipe. ; add group script = /usr/sbin/addgroup --force-badname %g

[SurprisingEdge]

It wouldn't let me include the whole config in the last message, so here's the rest.

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############ Misc ############ # Using the following line enables you to customise your configuration # on a per machine basis. The %m gets replaced with the netbios name # of the machine that is connecting ; include = /home/samba/etc/smb.conf.%m # Some defaults for winbind (make sure you're not using the ranges # for something else.) ; idmap config * : backend = tdb ; idmap config * : range = 3000-7999 ; idmap config YOURDOMAINHERE : backend = tdb ; idmap config YOURDOMAINHERE : range = 100000-999999 ; template shell = /bin/bash # Setup usershare options to enable non-root users to share folders # with the net usershare command. # Maximum number of usershare. 0 means that usershare is disabled. # usershare max shares = 100 # Allow users who've been granted usershare privileges to create # public shares, not just authenticated ones usershare allow guests = yes #======================= Share Definitions ======================= # Un-comment the following (and tweak the other settings below to suit) # to enable the default home directory shares. This will share each # user's home directory as \\server\username [homes] comment = Home Directories browseable = no # By default, the home directories are exported read-only. Change the # next parameter to 'no' if you want to be able to write to them. read only = no # File creation mask is set to 0700 for security reasons. If you want to # create files with group=rw permissions, set next parameter to 0775. create mask = 0775 # Directory creation mask is set to 0700 for security reasons. If you want to # create dirs. with group=rw permissions, set next parameter to 0775. directory mask = 0775 # By default, \\server\username shares can be connected to by anyone # with access to the samba server. # Un-comment the following parameter to make sure that only "username" # can connect to \\server\username # This might need tweaking when using external authentication schemes ; valid users = %S # Un-comment the following and create the netlogon directory for Domain Logons # (you need to configure Samba to act as a domain controller too.) ;[netlogon] ; comment = Network Logon Service ; path = /home/samba/netlogon ; guest ok = yes ; read only = yes # Un-comment the following and create the profiles directory to store # users profiles (see the "logon path" option above) # (you need to configure Samba to act as a domain controller too.) # The path below should be writable by all users so that their # profile directory may be created the first time they log on ;[profiles] ; comment = Users profiles ; path = /home/samba/profiles ; guest ok = no ; browseable = no ; create mask = 0600 ; directory mask = 0700 [printers] comment = All Printers browseable = no path = /var/spool/samba printable = yes guest ok = no read only = yes create mask = 0700 # Windows clients look for this share name as a source of downloadable # printer drivers [print$] comment = Printer Drivers path = /var/lib/samba/printers browseable = yes read only = yes guest ok = no # Uncomment to allow remote administration of Windows print drivers. # You may need to replace 'lpadmin' with the name of the group your # admin users are members of. # Please note that you also need to set appropriate Unix permissions # to the drivers directory for these users to have write rights in it ; write list = root, @lpadmin [media] path = /mnt/media read only = no browseable = yes create mask = 0775 directory mask = 0775 #[mediaguest] # path = /mnt/media # read only = yes # guest ok = no # browseable = yes # create mask = 0775 # directory mask = 0775 [backup] path = /mnt/backup read only = no browseable = yes create mask = 0775 directory mask = 0775 [usb] path = /mnt/usb read only = no browseable = yes create mask = 0775 directory mask = 0775

I think my config is pretty much the default, other than the shares, and turning up the logging which I did specifically for debugging this issue.

[djuleb83]

Hello,
I still have the same problem (infinite loading) with this TestFlight-version (.13) and my Windows 10 shares with authentication.

I hope you will find a solution.
best regards

[jennix]

can confirm this is happening. not that y'all didn't know that, just want to get notified about updates to the issue. now i have to use the "Remote Files" app to browse the LAN with my iphone

[Vsh123]

Felix,
So you know, and I will post under my thread as well, 3.2.13 does allow us to log into Box and view/work with files.
I am ready to see it in the App Store

[djuleb83]

I confirm that version 3.2.13 (369) does not work with Windows 10 shares either.
Never had any problem before the 3.2.12 update of the application.

[djuleb83]

He is my security log on the windows'box when I try to connect (in french sorry)

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Échec d’ouverture de session d’un compte. Sujet : ID de sécurité : NULL SID Nom du compte : - Domaine du compte : - ID d’ouverture de session : 0x0 Type d’ouverture de session : 3 Compte pour lequel l’ouverture de session a échoué : ID de sécurité : NULL SID Nom du compte : Dju Domaine du compte : WORKGROUP Informations sur l’échec : Raison de l’échec : Nom d’utilisateur inconnu ou mot de passe incorrect. État : 0xC000006D Sous-état : 0xC000006A Informations sur le processus : ID du processus de l’appelant : 0x0 Nom du processus de l’appelant : - Informations sur le réseau : Nom de la station de travail : - Adresse du réseau source : 2a01:cb1c:8064:bf00:20e6:6d55:...:.... [*] Port source : 49636 Informations détaillées sur l’authentification : Processus d’ouverture de session : NtLmSsp Package d’authentification : NTLM Services en transit : - Nom du package (NTLM uniquement) : - Longueur de clé : 0 Cet événement est généré lorsqu’une demande d’ouverture de session échoue. Il est généré sur l’ordinateur sur lequel l’accès a été tenté. Le champ Objet indique le compte sur le système local qui a demandé l’ouverture de session. Il s’agit le plus souvent d’un service, comme le service Serveur, ou un processus local tel que Winlogon.exe ou Services.exe. Le champ Type d’ouverture de session indique le type d’ouverture de session qui a été demandé. Les types les plus courants sont 2 (interactif) et 3 (réseau). Les champs relatifs aux informations sur le processus indiquent quel est le compte et le processus sur le système qui ont demandé l’ouverture de session. Les champs relatifs aux informations sur le réseau indiquent la provenance de la demande d’ouverture de session distante. Le nom de la station de travail n’étant pas toujours disponible, peut rester vide dans certains cas. Les champs relatifs aux informations d’authentification fournissent des détails sur cette demande d’ouverture de session spécifique. - Les services en transit indiquent les services intermédiaires qui ont participé à cette demande d’ouverture de session. - Le nom du package indique quel a été le sous-protocole qui a été utilisé parmi les protocoles NTLM. - La longueur de la clé indique la longueur de la clé de session générée. Elle a la valeur 0 si aucune clé de session n’a été demandée.

[*]IP edited

...I'm sure of my login & password.

[TTThoma]

Win 10 password protected shares also fail to load with ipadOS version 3.2.12 (365) All Along the Watchtower for me. I have successfully opened this share using the ipadOS 'Files' app, copy/pasting the username and password from an email.

[Archer17]

I also am having trouble connecting to a Windows 10 SMB using VLC on iOS. TestFlight version 3.2.13 didn't work either, and VLC worked before. I had to go in and enable SMB v1 on the Windows machine in order to get it working again. iOS 14 files app can access the SMB share with no issues.

[SurprisingEdge]

I haven't been able to figure out how to connect to my SMB server using VLC in any Apple devices. I've tried various SMB settings on the server to use version 1 or 3 (since the bug seems to be with 2, I hear?) but nothing is working.

[fkuehne]

I just pushed a new TestFlight version this evening. Please retry your tests. Thank you!