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CVE-2025-21491: Medium Vulnerability in Oracle MySQL Server

A medium-severity vulnerability has been identified in Oracle MySQL Server impacting versions up to 8.0.40. Attackers with network access could exploit this vulnerability, leading to potential denial of service. Organizations are advised to prioritize remediation.

MEDIUMCVSS 4.9 · Published January 21, 2025

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A vulnerability has been identified in the MySQL Server product of Oracle MySQL, specifically within the InnoDB component. The vulnerability affects supported versions, including 8.0.40 and prior, 8.4.3 and prior, and 9.1.0 and prior. This vulnerability allows a high privileged attacker with network access via multiple protocols to compromise the MySQL Server. Successful exploitation can result in an unauthorized ability to cause a hang or frequently repeatable crash, leading to a complete denial of service (DOS) of the MySQL Server.

The CVSS 3.1 Base Score for this vulnerability is 4.9, with the primary impact on availability. The CVSS vector indicates a network attack vector, low attack complexity, high privileges required, and no user interaction necessary.

Organizations should prioritize patching immediately to mitigate the risk associated with this vulnerability. Although the exploitation status for this vulnerability is currently not confirmed, the potential impact on availability warrants immediate attention.

As MySQL is widely used across various applications, any compromise could lead to significant downtime and operational impact, making timely remediation critical.

Vulnerability Details

The vulnerability is classified under CWE-770, which pertains to 'Allocation of Resources Without Limits or Throttling'. This classification emphasizes the potential for resource exhaustion through improper handling of requests.

Published on January 21, 2025, this vulnerability has been categorized as modified in terms of its status. Users are strongly encouraged to review the detailed advisory provided by Oracle for comprehensive patching guidance.

Technical Analysis

The root cause of this vulnerability lies in the inadequate handling of network requests, allowing attackers to exploit system resources. The attack vector is primarily network-based, requiring no local access, which simplifies the exploitation process.

With a low attack complexity, the requirement for high privileges means that an attacker must have elevated access within the MySQL environment. User interaction is not required, further increasing the risk of exploitation.

The vulnerability significantly impacts availability, as successful exploitation could lead to denial of service, potentially bringing down the MySQL server and affecting any dependent applications.

Risk & Impact Analysis

Risk to organizations includes potential downtime, loss of service availability, and operational disruption. Given the widespread use of MySQL in various applications, the blast radius of a successful attack could be substantial, affecting multiple services relying on the database.

With a CVSS score of 4.9, the urgency for remediation is categorized as medium. Organizations should address this vulnerability in their priority patch cycle to reduce exposure and mitigate potential downtime.

Exploitation Status

Signal

Status

Known Exploit

No

Public PoC

No

Actively Exploited

No

Ransomware Use

No

Affected Versions

The affected versions of Oracle MySQL Server include 8.0.40 and prior, 8.4.3 and prior, and 9.1.0 and prior. Organizations should ensure they upgrade to the latest patched versions to mitigate this vulnerability.

Mitigation & Remediation

Organizations should apply the latest patches provided by Oracle immediately. For further guidance on securing MySQL deployments, consider reviewing comprehensive resources on application security assessments that can help identify and mitigate vulnerabilities.

Detection Guidance

To detect potential exploitation attempts, organizations should monitor logs for unusual application behavior, particularly around the MySQL service. Look for patterns that indicate denial of service attacks, such as repeated service crashes or unresponsive instances.

AppSecure Threat Intelligence Insight

The long-term significance of this vulnerability highlights the importance of robust security practices in database management. Organizations should take this opportunity to reinforce their security posture by implementing regular penetration testing and vulnerability assessments.

Understanding trends in vulnerabilities, such as this one, can help organizations predict and prepare for similar issues in the future. Continuous monitoring and proactive security measures will be key in maintaining a secure environment.

For organizations looking to enhance their security framework, exploring resources on penetration testing methodology and best practices can provide valuable insights.

Finally, organizations should consider the insights from the latest trends in vulnerability management to stay ahead of potential threats.

Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.

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