External risk intelligence

ownCloud GraphAPI Information Disclosure Vulnerability

CVE advisoryKnown Exploit

CVE-2023-49103

A vulnerability in the ownCloud graphapi app can expose sensitive system details, including credentials. This poses a business risk by potentially allowing attackers unauthorized access to organizational data and systems. Updates are recommended to address this exposure.

4Halo Surface Signal

Information Disclosure

Owncloud Graph Api

0.2.00.3.0

External exposure likelihood

Halo Surface Signal score for CVE-2023-49103

The vulnerability affects ownCloud, a web-based file sharing and collaboration platform designed to be accessed over the network. As a web application, it is commonly deployed as an internet-facing service or portal, making the vulnerable component reachable by remote users or attackers in standard deployment scenarios.

Horizon Alert

Summary of the vulnerability and why it matters

The ownCloud graphapi app, specifically versions prior to 0.2.1 and 0.3.1, is susceptible to an information disclosure flaw. This weakness allows unauthorized access to sensitive environment variables, including potentially critical credentials for administrators and mail servers, especially in containerized deployments. The exposure of such data can significantly compromise the security and integrity of the organization's systems and operations.

  • Vulnerable component: ownCloud graphapi app
  • Core weakness: Reveals PHP environment details
  • Main business impact: Disclosure of sensitive credentials

Attack Path

How an attacker could exploit the issue

An attacker can exploit a vulnerability in the graphapi app to gain unauthorized access to sensitive system information. This exposure allows attackers to discover critical details about the PHP environment, which may include credentials for the ownCloud administrator, mail servers, and license keys. Attackers can leverage this gathered information to compromise the organization's systems.

  • Access to a specific URL.
  • Attacker accesses a vulnerable URL.
  • Discloses sensitive configuration details.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability allows attackers to access sensitive information, such as administrative passwords and mail server credentials, by accessing a specific URL. This information disclosure could be used to gain unauthorized access to the system. The vulnerability affects the graphapi app in ownCloud and is present in certain versions of the software.

  • Low to moderate attacker skill
  • Unauthenticated network access
  • High business risk, urgent action needed

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability exposes sensitive environment variables, including credentials and configuration details, from the PHP environment of the ownCloud graphapi. Attackers can access this information by accessing a specific URL, potentially leading to unauthorized access or system compromise. Organizations should take immediate steps to identify and mitigate this risk.

  • Identify instances of the graphapi app.
  • Disable the graphapi app if possible.
  • Apply vendor updates and verify.

Frequently asked questions

What is the ownCloud GraphAPI and its function within the ownCloud platform?

The ownCloud GraphAPI is an application for the ownCloud platform, which is typically used for file sharing and collaboration. The GraphAPI likely extends these core functionalities, possibly by enabling integration with other services or offering improved data access capabilities.

How does the ownCloud GraphAPI vulnerability (CVE-2023-49103) lead to sensitive information disclosure?

CVE-2023-49103 is an information disclosure vulnerability attributed to a third-party library within the GraphAPI app. Accessing a specific URL associated with this library exposes PHP configuration details, including all webserver environment variables. In containerized environments, these variables might contain sensitive data such as ownCloud admin passwords and mail server credentials.

What is the trigger path for the ownCloud GraphAPI information disclosure vulnerability?

The vulnerability is triggered when a specific URL, provided by a third-party GetPhpInfo.php library integrated into the GraphAPI app, is accessed. This action causes the PHP environment's configuration details (phpinfo) to be revealed.

What is the relevance of CVE-2023-49103, considering its network accessibility and potential impact?

The ownCloud GraphAPI vulnerability is relevant due to its external exposure classification, meaning it can be attacked over a network. The weakness, identified as CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor), allows for the disclosure of PHP configuration details, potentially including sensitive credentials and license keys, which poses a significant risk.

What are the recommended practical steps to address the ownCloud GraphAPI vulnerability?

To address this vulnerability, organizations should first identify all instances of the graphapi app within their ownCloud deployment. If feasible, disabling the graphapi app can serve as an immediate mitigation. Applying vendor-provided updates and verifying the successful implementation of these fixes are also crucial steps.

References