Security advisory: Normal user can somehow make admin to delete shared folders

Platform: ownCloud Server Versions: 10.0.2 Date: 5/31/2017 Risk level: Medium CVSS v3 Base Score: 4.3 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N CWE: Improper Privilege Management CWE-269 HackerOne report:Â 166581...

Improper validation of certificates when using self-signed certificates 2.0.1

The ownCloud Desktop Client was vulnerable against MITM attacks until version 2.0.0 in combination with self-signed certificates. To be exploitable the following conditions have to be met:...

Server: Disclosure of users files when deleting parent folders of shared files

Due to a common incorrect usage of the getPath function of the ownCloud virtual filesystem multiple security issues occurred. Especially the function may return null in case the specified file does not exist anymore. When passing the result of getPath in combination with null to functions that...

Server: Multiple stored XSS in "documents" application

Due to not sanitising all user provided input, the "documents" application shipped with the mentioned ownCloud versions is vulnerable to multiple stored cross-site scripting attacks. The "documents" application is enabled by default in the ownCloud Community Edition but not shipped with the...

Server: Enumeration of shared files in documents

Due to using the auto-incrementing fileid instead of the random generated token to access files in the documents app an authenticated users could enumerate shared files of other users. For more information please consult the official advisory. This advisory is licensed CC BY-SA 4.0...

Server: Code execution in external storage

Due to not sufficiently sanitizing the user input in "settings/personal.php" in ownCloud 4.5.x before 4.5.6 an authenticated remote attackers may be able to execute arbitrary code by entering special crafted PHP code in the mount point settings. For more information please consult the official...

Server: HTTP header injection

A Header injection vulnerability in ownCloud before 4.0.8 allows remote attackers to perform HTTP Response Splitting attacks to modify expected HTML content from the server via the HTTP url path parameter to index.php. For more information please consult the official advisory. This advisory is...

Server: Auth bypass in index.php

ownCloud 4.0.6 and all versions previous to this doesn't sufficiently verify whether a request to appconfig.php was sent by an admin, which allows remote authenticated users to edit app configurations. NOTE: this can be leveraged by unauthenticated remote attackers using CVE-2012-4393. For more...

Improper validation of certificates when using self-signed certificates - ownCloud

The ownCloud Desktop Client was vulnerable against MITM attacks until version 2.0.0 in combination with self-signed certificates. To be exploitable the following conditions have to be met: The connection to the remote ownCloud server must be secured using a self-signed certificate which the user...

Credentials potentially leaked to other configured ownCloud instance

A bug in the ownCloud iOS application below version 3.4.4 may leak credentials as well as cookies used for authentication purposes to other configured ownCloud instances...

Server: Improper authorization checks in documents

Due to not verifying whether an user has permission to rename files of other users an authenticated user could rename files of other users without permission. For more information please consult the official advisory. This advisory is licensed CC BY-SA 4.0...

Privilege escalation in the calendar application - ownCloud

Due to not properly checking the ownership of an calendar, an authenticated attacker is able to download calendars of other users via the "calendarid" GET parameter to /apps/calendar/ajax/events.php Note: Successful exploitation of this privilege escalation requires the "calendar" app to be enabl...

Authenticated account enumeration in sharing dialog - ownCloud

The sharing dialog implements a user enumeration mitigation to prevent an authenticated user from getting a list of all accounts registered on the instance via the auto-complete dropdown. In the default configuration at least 3 characters of the name or email of the share-receiver “Sharee” must...

Improper validation of certificates within the iOS application

The ownCloud iOS Library was vulnerable against a remotely exploitable certification problem until version 1.1.2. The vulnerable library version is used by the official ownCloud iOS client until version 3.4.4...

Auth bypass in "user_webdavauth" - ownCloud

A not further specified authentication bypass in the userwebdavauth application has been found. Using this vulnerability an attacker might login to the ownCloud instance without valid credentials. Affected Software ownCloud Server 5.0.8 ownCloud Server 4.5.13 Action Taken Acknowledgements The...

contacts: SQL Injection - ownCloud

ownCloud before 5.0.1 does not neutralize special elements that are passed to the SQL query in addressbookprovider.php which therefore allows an authenticated attacker to execute arbitrary SQL commands. Affected Software ownCloud Server 5.0.1 CVE-2013-1893 Action Taken It is recommended that all...

Server: Multiple XSS vulnerabilities

Multiple cross-site scripting XSS vulnerabilities in ownCloud 4.5.8 and all prior versions except 4.0.x allow remote attackers to inject arbitrary web script or HTML via the "quota" POST parameter to setquota.php in /core/settings/ajax/ Commits: 2364c79 stable45 Risk: Low Note: Successful...

Server: CSRF in appconfig.php

Cross-site request forgery CSRF vulnerability in core/ajax/appconfig.php in ownCloud before 4.0.7 allows remote attackers to hijack the authentication of administrators for requests that edit the app configurations. For more information please consult the official advisory. This advisory is...

Full path and username disclosure in public links - ownCloud

By appending certain characters to the query parameters of a public share link an error could be triggered which would display the internal path and username of the share owner...

Desktop Client: Improper validation of certificates when using self-signed certificates

The ownCloud Desktop Client was vulnerable against MITM attacks until version 2.0.0 in combination with self-signed certificates. To be exploitable the following conditions have to be met: The connection to the remote ownCloud server must be secured using a self-signed certificate which the user...

CSRF in documents - ownCloud

Due to not verifying whether a request was intentionally provided by the user who submitted an request the documents application is vulnerable against several CSRF attacks. An attacker could have used this to arbitrary modify existing files or rename it. Affected Software ownCloud Server 6.0.3...

Server: Local file disclosure when running on Windows

Due to not rejecting "" as path separator in all ownCloud versions prior to 5.0.4 including the 4.x branch an authenticated remote attacker is able to download arbitrary files from the server when running under Windows. This vulnerability exists inside our used DAV implementation "SabreDAV" and...

Server: contacts: SQL Injection

ownCloud before 5.0.1 does not neutralize special elements that are passed to the SQL query in addressbookprovider.php which therefore allows an authenticated attacker to execute arbitrary SQL commands. For more information please consult the official advisory. This advisory is licensed CC BY-SA ...

Server: Host Header Poisoning

Due to trusting user supplied input and interpret it as Host header an attacker is able to craft a password reset mail with a link pointing to his own site. If a user clicks on the link or a software e.g. antivirus is accessing the link the attacker is able to reset the user password. For more...

Password autocompletion - ownCloud

Index.php aka the login page contains a form that does not disable the autocomplete setting for the password parameter, which makes it easier for local users or physically proximate attackers to obtain the password from web browsers that support autocomplete. Affected Software ownCloud Server 5.0...

Server: Privilege escalation in the calendar application

Due to not properly checking the ownership of an calendar, an authenticated attacker is able to download calendars of other users via the "calid" GET parameter to export.php in /apps/calendar/ For more information please consult the official advisory. This advisory is licensed CC BY-SA 4.0...

Server: Multiple CSRF vulnerabilities

Multiple cross-site request forgery CSRF vulnerabilities in ownCloud 4.5.6 and 4.0.11 and all prior versions before allows remote attackers to hijack the authentication for users via the "lat" and "lng" POST parameters to guesstimezone.php in /apps/calendar/ajax/settings/ CVE-2013-0299 Commits:...

Multiple reflected XSS - ownCloud

Multiple cross-site scripting XSS vulnerabilities in ownCloud before 4.0.2 allow remote attackers to inject arbitrary web script or HTML via file names to apps/userldap/settings.php url or title parameter to apps/bookmarks/ajax/editBookmark.php tag or page parameter to...

Arbitrary code execution through admin settings - ownCloud

In the administration settings of the filesantivirus app it was possible to execute arbitrary code...

Information Exposure Through Directory Listing in the file scanner - ownCloud

Due to an incorrect usage of an ownCloud internal file system function the passed path to the file scanner was resolved relatively. An authenticated adversary may thus be able to get a listing of files existing on the filesystem. However, it is not possible to access any of these files. This caus...

ACLs not properly enforced in "documents" application - ownCloud

The "documents" application is a collaborative web-based online editor for ODT files. Using this application you can easily share and collaborate on office documents. This application uses strong and very long random "Session IDs" to limit access to specific resources. Knowledge of this ID allows...

Server: Local Path Disclosure when using Asset Pipeline

ownCloud 7 introduced the so-called "Asset Pipeline". It is disabled by default, but can be enabled by setting asset-pipeline.enabled to true in config.php When the setting is enabled ownCloud concatenates all CSS and JS files into a single large blob file. Thus the amount of initial required...

Reflected XSS - ownCloud

Cross-site scripting XSS vulnerability in index.php in ownCloud before 4.0.3 allows remote attackers to inject arbitrary web script or HTML via the redirecturl parameter. Affected Software ownCloud Server 4.0.3 CVE-2012-4395 Action Taken It is recommended that all instances are upgraded to ownClo...

Command injection when using external SMB storage - ownCloud

The external SMB storage of ownCloud was not properly neutralizing all special elements which allows an adversary to execute arbitrary SMB commands. This was caused by improperly sanitizing the ; character which is interpreted as command separator by smbclient the used software to connect to SMB...

Multiple XSS vulnerabilities - ownCloud

Cross-site scripting XSS vulnerabilities in js/viewer.js inside the filesvideoviewer application via multiple unspecified vectors in all ownCloud versions prior to 5.0.7 and 4.5.12 allows authenticated remote attackers to inject arbitrary web script or HTML via shared files. CVE-2013-2150...

Disclosure of users files when deleting parent folders of shared files - ownCloud

Due to a common incorrect usage of the getPath function of the ownCloud virtual filesystem multiple security issues occurred. Especially the function may return null in case the specified file does not exist anymore. When passing the result of getPath in combination with null to functions that...

CSRF in "bookmarks" application - ownCloud

Due to not verifying the CSRF token on the import functionality of the "bookmarks" application, it was vulnerable against CSRF attacks. The "bookmarks" application is disabled by default. An unauthenticated attacker could have used this to import bookmarks into the "bookmarks" application if the...

Deserialization of Untrusted Data in core - ownCloud

Due to the deserialization of unstrusted data in core an attacker might be able to delete arbitrary files from the filesystem or executing arbitrary SQL queries. This issue has been found in a widely used third-party library, we have removed the component due to general quality concerns from the...

Multiple code executions - ownCloud

A code executions vulnerability in ownCloud 4.5.6 and 4.0.11 and all prior versions allow authenticated remote attackers to execute arbitrary PHP code via unspecified POST parameters to translations.php in /core/ajax/ Commits: 74e73bc stable4, ece08cd stable45 Risk: Critical A code executions...

Missing URL validation allowed RCE on the desktop client - ownCloud

A malicious server could achieve remote code execution on the desktop client because of missing validation of URLs. Exploitation required user interaction...

Federated share recipient can increase permissions - ownCloud

The receiver of a federated share could update the permissions granted to the receivers of the share...

Upload of malicious files to publicly shared folders - ownCloud

It was possible to upload malicious files to a public share. The malicious files were detected but ended up in a state where they were not deleted...

Share tokens for public calendars disclosed - ownCloud security advisory

Platform: ownCloud Server Versions: 10.0.2 Date: 5/31/2017 Risk level: Medium CVSS v3 Base Score: 4.3 AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N CWE: Information Exposure Through Directory Listing CWE-548...

Local Code Injection – ownCloud Security Advisory

The ownCloud Client was vunerable to a local code injection attack. A malicious local user could create a special path where the client would load libraries from during startup. As on Windows, everyone by default has the permission to write to the C: drive and create arbitrary directories and...

Improper authorization checks in files_external - ownCloud

Due to not verifying whether an user has been granted access to add external storages an authenticated user could even mount external storage e.g. SMB/FTP/etc. without permission. Affected Software ownCloud Server 6.0.3 CVE-2014-3835 ownCloud Server 5.0.16 CVE-2014-3835 Action Taken We reviewed t...

Several CSRF security fixes - ownCloud

Multiple cross-site request forgery CSRF vulnerabilities in ownCloud before 4.0.6 allow remote attackers to hijack the authentication of arbitrary users for requests that use addBookmark.php in bookmarks/ajax/ delBookmark.php in bookmarks/ajax/ editBookmark.php in bookmarks/ajax/...

Session fixation on public links - ownCloud

The session cookies were not reset after authenticating for public links...

DLL injection in the ownCloud Desktop Client - ownCloud

The released desktop client was loading development plugins from certain directories when they were present...

Local file disclosure due to the preview system - ownCloud

ownCloud includes a preview system which generates the small thumbnails shown in the file list of the web interface. This functionality can be controlled with the enablepreviews switch in config.php and is enabled by default. Multiple unspecified vulnerabilities have been found within the preview...

Server: Insufficient RSA Host Key validation in files_external (SFTP driver)

The SFTP external storage driver was verifying the RSA Host Key after logging in. This allows for a man-in-the-middle MITM attack even if the host key is already known and can be validated. Basically, at the point where the host key was validated, the secret has already been given away. It should...