CVE-2022-42252 is a high-severity vulnerability affecting Apache Tomcat versions 8.5.0 to 8.5.82, 9.0.0-M1 to 9.0.67, 10.0.0-M1 to 10.0.26, and 10.1.0-M1 to 10.1.0. This vulnerability allows for a request smuggling attack if Tomcat is configured to ignore invalid HTTP headers by setting rejectIllegalHeader to false. This setting is the default for version 8.5.x only. The attack is possible if Tomcat is behind a reverse proxy that also fails to reject requests with invalid headers.
The vulnerability has a CVSS score of 7.5, categorizing it as high severity, indicating a significant risk to organizations using affected versions. Attackers may leverage this vulnerability to manipulate requests, potentially leading to unauthorized access and integrity issues.
Organizations should prioritize patching immediately. Remediation is essential to prevent exploitation and secure web applications relying on Apache Tomcat.
Currently, there is no public exploit confirmed for this vulnerability, and it is not listed in the Known Exploited Vulnerabilities (KEV) catalog. However, the potential for exploitation remains high, and vigilance is recommended.
Vulnerability Details
The official description of CVE-2022-42252 states that it allows for a request smuggling attack if Apache Tomcat is configured incorrectly. The vulnerability affects multiple versions of Tomcat and is categorized under CWE-444, which relates to improper handling of invalid HTTP headers.
The CVSS score of 7.5 indicates that this vulnerability poses a significant threat, especially in network environments where attackers can exploit the low attack complexity.
The affected product is Apache Tomcat, and organizations utilizing versions within the specified ranges must take immediate action to secure their systems.
Technical Analysis
The root cause of this vulnerability lies in the misconfiguration of the rejectIllegalHeader setting. When set to false, Tomcat does not properly reject invalid Content-Length headers. This oversight creates an opportunity for attackers to perform request smuggling, potentially bypassing security controls.
The attack vector is network-based, requiring no privileges or user interaction, thus making it easier for attackers to exploit. The integrity impact is high, as successful exploitation can lead to unauthorized data manipulation.
Organizations must ensure that their configurations are set correctly to avoid this vulnerability. Monitoring and logging can help detect anomalous behavior indicative of exploitation attempts.
Risk & Impact Analysis
The real-world risk associated with CVE-2022-42252 is significant, particularly for organizations that may use Apache Tomcat behind reverse proxies. Attackers exploiting this vulnerability could manipulate request handling, leading to data integrity issues and potential unauthorized access.
The blast radius of this vulnerability could extend to any application relying on the affected versions of Tomcat. Therefore, organizations must assess the potential impact on their systems and prioritize remediation efforts accordingly.
Given the CVSS score and the lack of current known exploitation, organizations should still treat this vulnerability as a high priority in their patch cycle.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of Apache Tomcat include:
• 8.5.0 to 8.5.82 • 9.0.0-M1 to 9.0.67 • 10.0.0-M1 to 10.0.26 • 10.1.0-M1 to 10.1.0
Mitigation & Remediation
Organizations should patch affected systems immediately. The recommended action is to upgrade to the latest version of Apache Tomcat that addresses this vulnerability. If immediate patching is not feasible, consider implementing configuration changes to reject invalid HTTP headers.
For further guidance, organizations may refer to penetration testing services that can help identify similar vulnerabilities.
Detection Guidance
Monitoring for indicators of exploitation is crucial. Organizations should look for unusual request patterns, especially those involving invalid Content-Length headers. Implementing logging mechanisms will assist in detecting potential attempts to exploit this vulnerability.
Behavioral anomalies in server responses should also be investigated. This proactive approach can help mitigate any potential impact from this vulnerability.
AppSecure Threat Intelligence Insight
CVE-2022-42252 represents a critical vulnerability that highlights the importance of secure configuration in web servers. Security teams should recognize the potential for request smuggling attacks and implement robust validation mechanisms.
This vulnerability illustrates a broader trend where misconfigurations lead to significant security risks. Organizations must remain vigilant and continuously assess their configurations against best practices.
For comprehensive strategies on securing web applications, organizations can explore resources such as penetration testing methodology and web application penetration testing to enhance security postures.
By understanding vulnerabilities like CVE-2022-42252, security teams can better prepare for and mitigate risks associated with web application threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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