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...

Federated share recipient can increase permissions - ownCloud

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

DLL injection in the ownCloud Desktop Client - ownCloud

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

Cross-site Request Forgery in diagnostics app - ownCloud

Improper handling of CSRF protection in the diagnostics app in combination with the SameSite-Cookie setting being set to None allows cross site invocation of an admin API...

Server-Side Request Forgery in federated sharing API - ownCloud

Server-Side Request Forgery in federated sharing API may allow an unauthenticated attacker to identify internal servers. Furthermore, due to improper timeout handling, the server could be affected by a Denial of Service attack...

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...

WebDAV Api Authentication Bypass using Pre-Signed URLs - ownCloud

It is possible to access, modify or delete any file without authentication if the username of the victim is known and the victim has no signing-key configured which is the default...

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...

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...

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...

Shareinfo url doesn't verify file drop permissions - ownCloud

The permission check for a file drop upload only share could be circumvented by using the shareinfo API. This allowed to see from the files in the filedrop but didn’t allow downloads...

Server: Multiple XSS

Due to not sanitising all user provided input the below mentioned ownCloud versions are vulnerable against several XSS attack vectors. ownCloud advises browsers to disable inline JavaScript execution due to the used Content-Security-Policy, this vulnerability is therefore likely not exploitable i...

Server: XSS in "Share Interface"

Multiple stored and reflected XSS have been adressed. For more information please consult the official advisory. This advisory is licensed CC BY-SA 4.0...

Biometric Authentication Bypass - ownCloud

Improper validation in the Biometric authentication process may allow an attacker to bypass that process and gain unauthorized access. This attack requires physical access to the vulnerable device...

Bypassing File Firewall (oC-SA-2020-002)

Platform: ownCloud Server Versions: n/a Date: 8/3/2020 Risk: Low CVSS v3 Base Score: 1.6 CVSS v3 Vector: AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:N CWE ID: CWE-791 CWE Name: Incomplete Filtering of Special Elements...

Public-Link Password-Bypass via Image-Previews – ownCloud

------- It was possible to access the preview-image of a password-protected public-link. The severity of the issue is reduced to low because the attacker needs to know the public-link hash and the original filename of the image. Affected ----- - owncloud/core v10.4 Action taken -------- Applied...

Server: Mounted Dropbox storage allows "Dropbox.com" to access any file

A bug in the SDK used to connect ownCloud against the Dropbox server might allow the owner of "Dropbox.com" to gain access to any files on the ownCloud server if an external Dropbox storage was mounted. This was caused by a feature of PHP which has been turned off per default as of PHP 5.6.0 in t...

Multiple XSS - ownCloud

Multiple stored and reflected XSS have been adressed. Affected Software ownCloud Server 6.0.2 Action Taken Acknowledgements The ownCloud team thanks the following people for their research and responsible disclosure of the above advisory: Dirk van Veen - Itq [email protected] - Vulnerability...

Mounted Dropbox storage allows "Dropbox.com" to access any file - ownCloud

A bug in the SDK used to connect ownCloud against the Dropbox server might allow the owner of "Dropbox.com" to gain access to any files on the ownCloud server if an external Dropbox storage was mounted. This was caused by a feature of PHP which has been turned off per default as of PHP 5.6.0 in t...

Deleting received group share for whole group

Platform: ownCloud Server Versions: 10.2.0 Date: 2/28/2020 Risk: Low CVSS v3 Base Score: 3.5 CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N CWE ID: 385 CWE Name: Improper Privilege Management...

Resource Exthaustion when sanitizing filenames - ownCloud

The sanitization component for filenames was vulnerable to DoS when parsing specially crafted file names passed via specific endpoints. Effectively this lead to a endless loop filling the log file until the system is not anymore responsive. Affected Software ownCloud Server 6.0.8 CVE-2015-4717...

XSS in "Share Interface" - ownCloud

Multiple stored and reflected XSS have been adressed. Affected Software ownCloud Server 5.0.8 Action Taken Acknowledgements The ownCloud team thanks the following people for their research and responsible disclosure of the above advisory: Lukas Reschke - ownCloud Inc. [email protected] -...

Server: Code execution in /lib/migrate.php

Incomplete blacklist vulnerability in lib/migrate.php in ownCloud before 4.5.2 allows authenticated remote attackers to execute arbitrary code by uploading a crafted mount.php file in an imported ZIP file. For more information please consult the official advisory. This advisory is licensed CC BY-...

Server: Code execution in /lib/filesystem.php

Incomplete blacklist vulnerability in lib/filesystem.php in ownCloud before 4.0.9 and 4.5.2 allows authenticated remote attackers to execute arbitrary code by uploading a file with a special crafted filename. For more information please consult the official advisory. This advisory is licensed CC...

Disclosure of sensitive credentials and configuration in containerized deployments - ownCloud

The “graphapi” app relies on a third-party library that provides a URL. When this URL is accessed, it reveals the configuration details of the PHP environment phpinfo. This information includes all the environment variables of the webserver. In containerized deployments, these environment variabl...

SQLInjection in FileContentProvider.kt - ownCloud

Due to some insecure code in a exported content provider an attacker with local access could retrieve information from the ownCloud app database through SQL injection...

Access to all file-versions of a user as soon as he has one share with the attacker – ownCloud

------- An authenticated attacker can access all versions of all files even unshared as soon as the owner of said files has at least one outgoing share with the attacker. To attacker needs to guess a file-id which is numeric and sequential. Affected ----- - owncloud/core = v10.0.9 - owncloud/core...

Access to all file-versions of a user - ownCloud security advisory

Platform: ownCloud Server Versions: 10.3.0 Date: 2/28/2020 Risk: Medium CVSS v3 Base Score: 6.8 CVSS v3 Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N CWE ID: 648 CWE Name: Incorrect Use of Privileged APIs...

Public-Link Password-Bypass via Image-Previews - ownCloud security advisory

Platform: ownCloud Server Versions: 10.3 Date: 2/28/2020 Risk: Low CVSS v3 Base Score: 3.1 CVSS v3 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N CWE ID: 284 CWE Name: Improper Access Control...

Local Path Disclosure when using Asset Pipeline - ownCloud

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...

Server: Deserialization of Untrusted Data in core

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...

Authentication Bypass Using Pre-signed URLs - ownCloud

Improper validation may allow an attacker to bypass authentication and gain access to users’ files. Prior knowledge of a username and a file path is needed in order to gain access to a certain file...

Denial of Service in Comments API - ownCloud

Insufficient input validation in the Comments Plugin may allow an authenticated attacker to cause a Denial of Service...

Edit of share permissions causes public links misbehaviour - ownCloud

Changes to the permissions of a share where propagated to public links of child resources...

Bypassing App Lock (Pattern/Passcode/Fingerprint lock | Android) (oC-SA-2020-003)

Given an attacker has physical access, creating a backup of the ownCloud Android app via adb provides access to the app preferences file. Contained in the file were settings related to the app lock feature such as the pincode/pattern and if the respective lock is active. An attacker could change...

Possibility to extend internal share permissions using the API - ownCloud security advisory

Platform: ownCloud Server Versions: 10.0.0 Date: 7/25/2019 Risk level: High CVSS v3 Base Score: 8 Improper Privilege Management, CWE-269...

Improper Validation in the User Profile Metadata - ownCloud

Improper Validation in the User Profile Metadata may allow an authenticated attacker to edit their own profile in a way that consumes a substantial amount of resources, creating a Denial of Service...

Security lock can be bypassed by changing the system date

Given an attacker has physical access to the device, a faulty timestamp check allowed to bypass the app lock by setting the system date to the past...

Server: Auth bypass in user_webdavauth and user_ldap

ownCloud 4.5.4, ownCloud 4.0.9 and all versions previous to this doesn't sufficiently verify whether a request to settings.php was sent by an admin, which allows unauthenticated users to edit app configurations of userwebdavauth and userldap. An unauthenticated attacker may use this to gain acces...

Subdomain Validation Bypass - ownCloud

Within the oauth2 app an attacker is able to pass in a specially crafted redirect-url which bypasses the validation code and thus allows the attacker to redirect callbacks to a TLD controlled by the attacker...

Deleting received group share for whole group – ownCloud

------- A group-share recipient can remove the received group share for all group-recipients. No data-loss occurs as the share can be re-created again. Affected ----- - owncloud/core v10.3.0 Action taken -------- Improve permission check when deleting groups...

SSRF in “Add to your ownCloud” functionality - security advisory

It is possible to force the ownCloud server to execute GET requests against a crafted URL on the internal or external network Server Side Request Forgery after receiving a public link-share URL. The criticality of this issue is lowered because the attacker can not see the result of the forged...

Code execution in /lib/filesystem.php - ownCloud

Incomplete blacklist vulnerability in lib/filesystem.php in ownCloud before 4.0.9 and 4.5.2 allows authenticated remote attackers to execute arbitrary code by uploading a file with a special crafted filename. Affected Software ownCloud Server 4.0.10 CVE-2013-5665 ownCloud Server 4.5.5 CVE-2013-56...

Security Advisory: Credential Theft Incidents - ownCloud

Comprehensive MFA options with administrative controls to enforce policies organization-wide, plus alerts when risky settings are used Embedded network and web application firewalls that are pre-configured and continuously updated—no customer maintenance required Zero-trust architecture with...

SSRF in "Add to your ownCloud" functionality – ownCloud

------- It is possible to force the ownCloud server to execute GET requests against a crafted URL on the internal or external network Server Side Request Forgery after receiving a public link-share URL. The criticality of this issue is lowered because the attacker can not see the result of the...

Server: Insecure OpenID implementation

Due to an insecure OpenID implementation used by useropenid in ownCloud 5 it is possible to log-into a system using an arbitrary OpenID Account without knowing any secret information, i.e. the password, about it by using a malicious OpenID provider. For more information please consult the officia...

Users can mount the local filesystem - ownCloud

Due to an insufficient permission check authenticated users are able to access preview pictures of others users. Affected Software ownCloud Server 6.0.1 Action Taken It is recommended that all instances are upgraded to ownCloud Server 6.0.2. Acknowledgements The ownCloud team thanks the following...

Server: Users can mount the local filesystem

Due to not properly sanitzing the mount configuration authenticated users are able to mount the local filesystem into their ownCloud. A successful exploit requires the filesexternal app to be enabled. For more information please consult the official advisory. This advisory is licensed CC BY-SA 4....

Server: Auth bypass in "user_webdavauth"

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. For more information please consult the official advisory. This advisory is licensed CC BY-SA 4.0...

Possibility to extend internal share permissions using the API – ownCloud

An Attacker can extend the permission of a received internal-share using the ocs-api. Check is currently only done in the UI. Affected Software ownCloud Server 10.2.1 CVE-2019-???? core/4ae39f7c70bb26e55d7396184da5c30dd75980a3 Action Taken Added better checks which prevent extending the permissio...