Apache HTTP Server versions 2.4.53 and earlier are affected by a critical vulnerability that allows attackers to cause crashes or disclose sensitive information. This issue arises from a read beyond bounds in the function ap_strcmp_match() when it receives an excessively large input buffer. Although the standard server code does not invoke this function with such input, third-party modules or Lua scripts may be vulnerable to this flaw, thereby necessitating urgent attention from system administrators.
The vulnerability has been assigned a CVSS score of 9.1, categorizing it as critical. The implications of this vulnerability are severe, as it poses significant risks to confidentiality and availability. Attackers may leverage this vulnerability to disrupt services or access sensitive data, making it imperative for organizations to assess their exposure and initiate remediation efforts without delay.
Given the critical nature of this vulnerability, organizations should prioritize patching immediately. Failure to do so could result in potential exploitation by malicious actors, leading to severe operational and reputational damage.
As of now, there are no known exploits associated with this vulnerability, and it is not listed in the Known Exploited Vulnerabilities (KEV) catalog. However, the potential for exploitation through third-party integrations remains a concern that should not be overlooked.
Organizations that utilize Apache HTTP Server in their environments must remain vigilant and ensure that they are operating on a patched version to mitigate risks stemming from this vulnerability.
Vulnerability Details
The official description of this vulnerability indicates that it affects Apache HTTP Server versions 2.4.53 and earlier. Specifically, the issue arises from a read beyond bounds in the function ap_strcmp_match() when it is provided with an extremely large input buffer. While no code distributed with the server can trigger such a call, third-party modules or Lua scripts that utilize ap_strcmp_match() may be hypothetically vulnerable.
The CVSS score for this vulnerability is 9.1, indicating a critical severity level. This score highlights the potential impact on confidentiality and availability, while integrity remains unaffected. The vulnerability has been classified under CWE-190, which refers to 'Integer Overflow or Wraparound.'
Technical Analysis
The root cause of this vulnerability lies in the handling of input buffers within the function ap_strcmp_match(). When the function is given an excessively large input, it may attempt to read beyond the allocated bounds, leading to crashes or unauthorized information disclosure. The attack vector for exploiting this vulnerability is network-based, requiring low complexity and no user interaction. Importantly, no privileges are required for exploitation, indicating that unauthenticated attackers could potentially leverage this vulnerability.
The impacts of this vulnerability are significant. The confidentiality impact is rated as high, meaning sensitive information could be exposed to attackers. Additionally, the availability impact is also rated high, as the vulnerability may lead to service disruptions. Organizations should consider the potential blast radius, which includes any third-party applications that integrate with Apache HTTP Server and could be affected by this flaw.
Risk & Impact Analysis
The real-world risk associated with this vulnerability is substantial. Organizations using Apache HTTP Server, particularly those that have integrated third-party modules or scripts, face a heightened risk of exposure. Without proper remediation, the potential for unauthorized access and service disruption could lead to significant operational challenges and reputational damage.
Given the critical CVSS score of 9.1, organizations should address this vulnerability in their priority patch cycle. The urgency is underscored by the fact that, while no active exploitation has been reported, the nature of the vulnerability suggests it could be targeted in the future, especially by threat actors looking to exploit weaknesses in widely used technologies.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerable versions of Apache HTTP Server are 2.4.53 and earlier. Additionally, Fedora versions 35 and 36 are also affected, as well as NetApp's clustered_data_ontap. Organizations should ensure they are running versions later than 2.4.54 for Apache HTTP Server and the appropriate patched versions for Fedora and NetApp products.
Mitigation & Remediation
Organizations should prioritize patching Apache HTTP Server to version 2.4.54 or later. Additionally, users of Fedora and NetApp's clustered_data_ontap should also apply the latest security updates from their respective vendors. If patching is not immediately feasible, organizations should consider disabling third-party modules or scripts that may call the vulnerable function until updates can be applied.
For enhanced security, organizations may also implement monitoring solutions to detect unusual behavior patterns that could indicate exploitation attempts. Regular security assessments and penetration testing can help identify potential vulnerabilities in third-party integrations.
Security testing and continuous monitoring are essential practices for maintaining a secure environment.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor logs for unusual access patterns or error messages related to the ap_strcmp_match() function. Additionally, behavioral anomalies in applications using Apache HTTP Server may indicate attempts to exploit this vulnerability.
Implementing network signatures that can identify traffic patterns consistent with exploitation attempts may also prove beneficial. Regular audits of system configurations and third-party module usage can help identify risks before they are exploited.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2022-28615 highlights the ongoing need for vigilance in the management of third-party integrations within widely-used platforms such as Apache HTTP Server. This vulnerability serves as a reminder of the risks associated with allowing external code to execute within server environments.
Security teams should take this opportunity to review their policies regarding third-party module usage, ensuring that all components are regularly updated and monitored for vulnerabilities. For a robust security posture, organizations should consider adopting a comprehensive vulnerability management program that includes continuous testing and validation of security controls.
In conclusion, the lessons learned from this vulnerability emphasize the importance of maintaining a proactive approach to security by continuously assessing and adapting to emerging threats. Organizations are encouraged to engage in regular penetration testing to identify and remediate vulnerabilities before they are exploited.
Organizations should also remain informed about the latest security trends and updates related to their software stack, reinforcing their defenses against 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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