CVE-2025-21495 is a medium-severity vulnerability found in the MySQL Enterprise Firewall component of Oracle MySQL. This vulnerability allows high privileged attackers with network access via multiple protocols to compromise the MySQL Enterprise Firewall. The affected versions are 8.0.40 and prior, 8.4.3 and prior, and 9.1.0 and prior. The CVSS 3.1 Base Score for this vulnerability is 4.4, indicating a medium level of risk primarily due to impacts on availability.
Successful exploitation of this vulnerability can lead to unauthorized capabilities that can cause a hang or frequently repeatable crash, resulting in a complete denial-of-service (DoS) condition for the MySQL Enterprise Firewall. Given the potential impact, organizations utilizing affected versions should prioritize remediation.
The urgency for defenders is highlighted by the CVSS score and the potential for significant disruption. Organizations should implement patches provided by Oracle to mitigate this vulnerability effectively.
Oracle published the details of this vulnerability on January 21, 2025, and remediation guidance is available through their advisory.
Vulnerability Details
The vulnerability in question specifically affects the MySQL Enterprise Firewall product of Oracle MySQL. It is classified under CWE-770, indicating a lack of appropriate handling of exceptional conditions, which can be exploited by attackers.
With a CVSS score of 4.4, the vulnerability’s primary impact is on availability, as it can lead to denial-of-service conditions. The attack vector is classified as network-based, with high attack complexity and requiring high privileges to exploit.
Technical Analysis
The root cause of this vulnerability lies in the improper handling of network requests, which can be exploited by an attacker with sufficient privileges. The attack complexity is considered high due to the requirement for elevated privileges, although once executed, it can lead to significant availability issues.
User interaction is not required for exploitation, making it easier for attackers to leverage this vulnerability. The confidentiality and integrity impacts are both assessed as none, but the availability impact is rated high, indicating that a successful exploit can lead to service interruptions.
Risk & Impact Analysis
Risk to organizations includes potential service disruptions that can affect business operations. The availability impact being high suggests that organizations relying on MySQL Enterprise Firewall for security could face significant operational challenges in the event of an exploit.
The urgency for addressing this vulnerability is underscored by its medium severity classification and potential for denial-of-service conditions. Organizations should prioritize patching as part of their security hygiene and risk management strategies.
With the CVSS score indicating a medium level of risk, this vulnerability should be addressed in the next patch cycle to minimize potential impacts.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions include MySQL Enterprise Firewall versions 8.0.40 and prior, 8.4.3 and prior, and 9.1.0 and prior. Organizations running these versions should take immediate action to update.
Mitigation & Remediation
Organizations should prioritize patching immediately. Oracle has released updates to address this vulnerability. Organizations can ensure their MySQL Enterprise Firewall is updated to the latest version to mitigate the risks associated with this vulnerability. For further guidance, organizations may consider utilizing penetration testing services to identify and rectify similar weaknesses.
Detection Guidance
Monitoring for unusual denial-of-service conditions and logging access attempts can help in identifying potential exploitation of this vulnerability. Organizations should also monitor system performance metrics for abrupt changes that may indicate an ongoing attack.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2025-21495 lies in its demonstration of the potential risks associated with network-exposed components. Security teams should learn from this vulnerability to emphasize the importance of patch management and proactive security measures.
This vulnerability represents a trend where attackers seek to exploit weaknesses in network configurations. Organizations should regularly evaluate their security posture and ensure robust defenses are in place.
Strategic defensive takeaway includes focusing on continuous security evaluations and leveraging services such as continuous penetration testing to ensure ongoing compliance with security best practices.
Organizations should also consider consulting application security assessments to identify and remediate vulnerabilities in their systems.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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