Owncloud : Security Vulnerabilities, CVEs, CVSS score >= 7

An issue was discovered in ownCloud owncloud/core before 10.13.1. An attacker can access, modify, or delete any file without authentication if the username of a victim is known, and the victim has no signing-key configured. This occurs because pre-signed URLs can be accepted even when no signing-key is configured for the owner of the files. The earliest affected version is 10.6.0.

An issue was discovered in ownCloud owncloud/oauth2 before 0.6.1, when Allow Subdomains is enabled. An attacker is able to pass in a crafted redirect-url that bypasses validation, and consequently allows an attacker to redirect callbacks to a Top Level Domain controlled by the attacker.

An issue was discovered in ownCloud owncloud/graphapi 0.2.x before 0.2.1 and 0.3.x before 0.3.1. The graphapi app relies on a third-party GetPhpInfo.php 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 variables may include sensitive data such as the ownCloud admin password, mail server credentials, and license key. Simply disabling the graphapi app does not eliminate the vulnerability. Additionally, phpinfo exposes various other potentially sensitive configuration details that could be exploited by an attacker to gather information about the system. Therefore, even if ownCloud is not running in a containerized environment, this vulnerability should still be a cause for concern. Note that Docker containers from before February 2023 are not vulnerable to the credential disclosure.

ownCloud owncloud/core before 10.10.0 Improperly Removes Sensitive Information Before Storage or Transfer.

ownCloud owncloud/client before 2.9.2 allows Resource Injection by a server into the desktop client via a URL, leading to remote code execution.

A receiver of a federated share with access to the database with ownCloud version before 10.8 could update the permissions and therefore elevate their own permissions.

The files_antivirus component before 1.0.0 for ownCloud mishandles the protection mechanism by which malicious files (that have been uploaded to a public share) are supposed to be deleted upon detection.

The files_antivirus component before 1.0.0 for ownCloud allows OS Command Injection via the administration settings.

The File Firewall before 2.8.0 for ownCloud Server does not properly enforce file-type restrictions for public shares.

ownCloud owncloud/client before 2.7 allows DLL Injection. The desktop client loaded development plugins from certain directories when they were present.

Deleting users with certain names caused system files to be deleted. Risk is higher for systems which allow users to register themselves and have the data directory in the web root. This affects ownCloud/core versions < 10.6.

An issue was discovered in ownCloud before 10.4. Because of an SSRF issue (via the apps/files_sharing/external remote parameter), an authenticated attacker can interact with local services blindly (aka Blind SSRF) or conduct a Denial Of Service attack.

Nextcloud Server before 9.0.54 and 10.0.1 & ownCloud Server before 9.1.2, 9.0.6, and 8.2.9 suffer from SMB User Authentication Bypass. Nextcloud/ownCloud include an optional and not by default enabled SMB authentication component that allows authenticating users against an SMB server. This backend is implemented in a way that tries to connect to a SMB server and if that succeeded consider the user logged-in. The backend did not properly take into account SMB servers that have any kind of anonymous auth configured. This is the default on SMB servers nowadays and allows an unauthenticated attacker to gain access to an account without valid credentials. Note: The SMB backend is disabled by default and requires manual configuration in the Nextcloud/ownCloud config file. If you have not configured the SMB backend then you're not affected by this vulnerability.

ownCloud Desktop before 2.2.3 allows local users to execute arbitrary code and possibly gain privileges via a Trojan library in a "special path" in the C: drive.

ownCloud Server before 8.0.10, 8.1.x before 8.1.5, and 8.2.x before 8.2.2 allow remote authenticated users to obtain sensitive information from a directory listing and possibly cause a denial of service (CPU consumption) via the force parameter to index.php/apps/files/ajax/scan.php.

The files_external app in ownCloud Server before 7.0.9, 8.0.x before 8.0.7, and 8.1.x before 8.1.2 allows remote authenticated users to instantiate arbitrary classes and possibly execute arbitrary code via a crafted mount point option, related to "objectstore."

icewind1991 SMB before 1.0.3 allows remote authenticated users to execute arbitrary SMB commands via shell metacharacters in the user argument in the (1) listShares function in Server.php or the (2) connect or (3) read function in Share.php.

Directory traversal vulnerability in ownCloud Server before 8.0.6 and 8.1.x before 8.1.1 allows remote authenticated users to list directory contents and possibly cause a denial of service (CPU consumption) via a .. (dot dot) in the dir parameter to index.php/apps/files/ajax/scan.php.

The external SMB storage driver in ownCloud Server before 6.0.8, 7.0.x before 7.0.6, and 8.0.x before 8.0.4 allows remote authenticated users to execute arbitrary SMB commands via a ; (semicolon) character in a file.

The filename sanitization component in ownCloud Server before 6.0.8, 7.0.x before 7.0.6, and 8.0.x before 8.0.4 does not properly handle $_GET parameters cast by PHP to an array, which allows remote attackers to cause a denial of service (infinite loop and log file consumption) via crafted endpoint file names.

Directory traversal vulnerability in the routing component in ownCloud Server before 7.0.6 and 8.0.x before 8.0.4, when running on Windows, allows remote attackers to reinstall the application or execute arbitrary code via unspecified vectors.

ownCloud Server before 6.0.3 does not properly check permissions, which allows remote authenticated users to (1) access the contacts of other users via the address book or (2) rename files via unspecified vectors.

PHPDocX, as used in ownCloud Server before 5.0.15 and 6.0.x before 6.0.2, allows remote attackers to read arbitrary files, cause a denial of service, or possibly have other impact via an XML External Entity (XXE) attack.

SabreDAV before 1.7.11, as used in ownCloud Server before 5.0.15 and 6.0.x before 6.0.2, allows remote attackers to read arbitrary files, cause a denial of service, or possibly have other impact via an XML External Entity (XXE) attack.

PHPExcel before 1.8.0, as used in ownCloud Server before 5.0.15 and 6.0.x before 6.0.2, does not disable external entity loading in libxml, which allows remote attackers to read arbitrary files, cause a denial of service, or possibly have other impact via an XML External Entity (XXE) attack.