Server: Bug: All existing shares removed after removing a remote user (federated) from sharing list

Created on 1 Feb 2020 · 9Comments · Source: nextcloud/server

Steps to reproduce

Share a file with a remote user (e.g. [email protected])
Unshare file (remove [email protected] from sharing list)
Refresh your NC ... all your existing shares is gone!(local/internal/remote shares on any file and directory)

Description

I have a local NextCloud instance and a public(remote) NextCloud instance (accessible from the internet), Federated share works fine between two public instance (e.g. my public instance and another public instance), I was eager to test Federation feature between my internal instance and my public one.
I shared a file with my user on public instance, I get a notification on public instance (as expected) related to that share and after accepting the _file sharing request_ nothing happened (it is reasonable, because the internal server is not accessible from public one).
So I decided to remove the remote user ([email protected]) from sharing list on internal NextCloud, after clicking on "unshare" button, remote user successfully deleted from sharing list (without any error) but ALL MY SHARES ON INTERNAL INSTANCE IS GONE! Even local ones. After removing remote user form I don't have any share.

This problem is reproducible.

Server configuration

Operating system:
Linux 4.15.0-74-generic #84-Ubuntu SMP Thu Dec 19 08:06:28 UTC 2019 x86_64
Web server:
Apache/2.4.38 (Debian) (apache2handler)
Database:
mysql 10.4.12
PHP version:
7.3.14
Modules loaded: Core, date, libxml, openssl, pcre, sqlite3, zlib, ctype, curl, dom, fileinfo, filter, ftp, hash, iconv, json, mbstring, SPL, PDO, session, posix, Reflection, standard, SimpleXML, pdo_sqlite, Phar, tokenizer, xml, xmlreader, xmlwriter, mysqlnd, apache2handler, apcu, exif, gd, gmp, imagick, intl, ldap, memcached, pcntl, pdo_mysql, pdo_pgsql, redis, sodium, zip, Zend OPcache
Nextcloud version: (see Nextcloud admin page)
18.0.0 - 18.0.0.10
Updated from an older Nextcloud/ownCloud or fresh install:

Where did you install Nextcloud from:
Using Docker, this is my docker-compose file: https://github.com/haghighi-ahmad/nextcloud-collabora-office
Signing status:

Signing status

No errors have been found.

List of activated apps:

App list

Enabled:
 - accessibility: 1.4.0
 - activity: 2.11.0
 - admin_audit: 1.8.0
 - analytics: 2.0.0
 - announcementcenter: 3.7.0
 - audioplayer: 2.9.0
 - audioplayer_editor: 0.2.0
 - bookmarks: 2.3.4
 - calendar: 2.0.1
 - circles: 0.18.1
 - cloud_federation_api: 1.1.0
 - comments: 1.8.0
 - contacts: 3.1.8
 - dav: 1.14.0
 - deck: 0.8.0
 - external: 3.5.0
 - federatedfilesharing: 1.8.0
 - federation: 1.8.0
 - files: 1.13.1
 - files_accesscontrol: 1.8.1
 - files_automatedtagging: 1.8.0
 - files_external: 1.9.0
 - files_pdfviewer: 1.7.0
 - files_rightclick: 0.15.2
 - files_sharing: 1.10.1
 - files_trashbin: 1.8.0
 - files_versions: 1.11.0
 - files_videoplayer: 1.7.0
 - firstrunwizard: 2.7.0
 - forms: 1.1.0
 - groupfolders: 6.0.1
 - issuetemplate: 0.6.0
 - logreader: 2.3.0
 - lookup_server_connector: 1.6.0
 - mail: 1.1.2
 - maps: 0.1.4
 - music: 0.12.1
 - nextcloud_announcements: 1.7.0
 - notes: 3.1.1
 - notifications: 2.6.0
 - oauth2: 1.6.0
 - password_policy: 1.8.0
 - photos: 1.0.0
 - privacy: 1.2.0
 - provisioning_api: 1.8.0
 - recommendations: 0.6.0
 - richdocuments: 3.5.1
 - serverinfo: 1.8.0
 - settings: 1.0.0
 - sharebymail: 1.8.0
 - sociallogin: 2.4.3
 - spreed: 8.0.1
 - systemtags: 1.8.0
 - tasks: 0.11.3
 - terms_of_service: 1.4.0
 - text: 2.0.0
 - theming: 1.9.0
 - twofactor_backupcodes: 1.7.0
 - twofactor_totp: 4.1.2
 - updatenotification: 1.8.0
 - user_ldap: 1.8.0
 - viewer: 1.2.0
 - workflow_pdf_converter: 1.3.1
 - workflowengine: 2.0.0
Disabled:
 - audioplayer_sonos
 - breezedark
 - bruteforcesettings
 - checksum
 - encryption
 - files_retention
 - impersonate
 - support
 - survey_client

Nextcloud configuration:

Config report

{
    "htaccess.RewriteBase": "\/",
    "memcache.local": "\\OC\\Memcache\\APCu",
    "apps_paths": [
        {
            "path": "\/var\/www\/html\/apps",
            "url": "\/apps",
            "writable": false
        },
        {
            "path": "\/var\/www\/html\/custom_apps",
            "url": "\/custom_apps",
            "writable": true
        }
    ],
    "memcache.distributed": "\\OC\\Memcache\\Redis",
    "memcache.locking": "\\OC\\Memcache\\Redis",
    "redis": {
        "host": "***REMOVED SENSITIVE VALUE***",
        "port": 6379,
        "password": "***REMOVED SENSITIVE VALUE***"
    },
    "instanceid": "***REMOVED SENSITIVE VALUE***",
    "passwordsalt": "***REMOVED SENSITIVE VALUE***",
    "secret": "***REMOVED SENSITIVE VALUE***",
    "trusted_domains": [
        "***REMOVED SENSITIVE VALUE***"
    ],
    "datadirectory": "***REMOVED SENSITIVE VALUE***",
    "dbtype": "mysql",
    "version": "18.0.0.10",
    "overwrite.cli.url": "https:***REMOVED SENSITIVE VALUE***",
    "overwriteprotocol": "https",
    "dbname": "***REMOVED SENSITIVE VALUE***",
    "dbhost": "***REMOVED SENSITIVE VALUE***",
    "dbport": "",
    "dbtableprefix": "oc_",
    "mysql.utf8mb4": true,
    "dbuser": "***REMOVED SENSITIVE VALUE***",
    "dbpassword": "***REMOVED SENSITIVE VALUE***",
    "installed": true,
    "maintenance": false,
    "theme": "",
    "versions_retention_obligation": "disabled",
    "loglevel": 2,
    "ldapIgnoreNamingRules": false,
    "ldapProviderFactory": "OCA\\User_LDAP\\LDAPProviderFactory",
    "mail_from_address": "***REMOVED SENSITIVE VALUE***",
    "mail_smtpmode": "smtp",
    "mail_sendmailmode": "smtp",
    "mail_domain": "***REMOVED SENSITIVE VALUE***",
    "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
    "mail_smtpport": "25",
    "app_install_overwrite": [
        "contacts",
        "unsplash"
    ]
}

Are you using external storage, if yes which one: local/smb/sftp/...
local/smb/sftp/...
Are you using encryption: no

Are you using an external user-backend, if yes which one: LDAP/ActiveDirectory/Webdav/...
Nope