Overview
CVE-2025-52671 describes a debug information disclosure vulnerability found in Revive Adserver versions 5.5.2 and 6.0.1 and earlier. This vulnerability allows non-administrator users to potentially acquire sensitive information about the software, PHP version, and database versions currently in use by the Revive Adserver instance. This information is exposed through overly verbose SQL error messages.
Technical Details
The vulnerability stems from the way Revive Adserver handles SQL errors. In vulnerable versions, when an SQL error occurs, the error message displayed contains debug information, including software versions, database details, and potentially PHP version information. A non-admin user who can trigger an SQL error (e.g., through a crafted request) could then view this error message and obtain this sensitive information.
CVSS Analysis
Unfortunately, the CVSS score and severity are listed as N/A for this CVE. While a CVSS score is not provided, information disclosure vulnerabilities are generally considered a moderate to high risk, depending on the sensitivity of the information disclosed and the ease of exploitation. The lack of a CVSS score doesn’t diminish the potential impact.
Possible Impact
The information disclosed through this vulnerability can be used to:
- Fingerprint the system: Attackers can identify the exact versions of software running, making it easier to find known vulnerabilities to exploit.
- Plan targeted attacks: Knowing the database type and version allows attackers to tailor their SQL injection attempts.
- Increase the attack surface: Leaked information can reveal potential weaknesses in the system configuration.
While the impact may not be immediately critical, it can significantly aid attackers in reconnaissance and subsequent exploitation attempts.
Mitigation or Patch Steps
The best course of action is to upgrade Revive Adserver to a version that addresses this vulnerability. Check the Revive Adserver official website for the latest version and security patches. If an upgrade is not immediately possible, consider the following mitigation steps:
- Implement custom error handling: Configure Revive Adserver or your web server to display generic error messages to users instead of detailed SQL error messages. This will prevent the disclosure of sensitive information. This may require custom code changes to Revive Adserver if it doesn’t natively support this.
- Review access controls: Ensure that only authorized users have access to sensitive functions that might trigger SQL errors.
- Monitor for suspicious activity: Keep an eye on server logs for unusual error patterns or requests that might be attempting to trigger SQL errors.
