Actively exploited · Published Nov 21, 2023 · Assigned by mitre
CVE-2023-49103
Critical 10.0 Exploited
In plain English
A critical-severity information exposure in ownCloud graphapi from ownCloud. Attackers are actively exploiting it in the wild (listed by CISA on November 30, 2023). The chance it is exploited in the next 30 days is estimated at 77.8% (higher than 99.6% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit, Nuclei, public proof-of-concept code. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA guidance
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Federal agencies must remediate by Dec 21, 2023.
Official description
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.
Affected products (as reported)
Weakness: CWE-200 · Vector: CVSS:3.1/AC:L/AV:N/A:H/C:H/I:H/PR:N/S:C/UI:N