CVE-2022-23181 Explained : Impact and Mitigation

The fix for bug CVE-2020-9484 introduced a time of check, time of use vulnerability into Apache Tomcat versions 8.5.55 to 8.5.73, 9.0.35 to 9.0.56, 10.0.0-M5 to 10.0.14, and 10.1.0-M1 to 10.1.0-M8. This vulnerability could allow a local attacker to exploit the FileStore configuration to escalate their privileges.

Understanding CVE-2022-23181

This section provides an overview of CVE-2022-23181 along with its impact and technical details.

What is CVE-2022-23181?

The CVE-2022-23181 vulnerability in Apache Tomcat versions 8.5.55 to 8.5.73, 9.0.35 to 9.0.56, 10.0.0-M5 to 10.0.14, and 10.1.0-M1 to 10.1.0-M8 allows a local attacker to perform unauthorized actions using the privileges of the Tomcat process's user when configured to persist sessions using FileStore.

The Impact of CVE-2022-23181

The impact of this vulnerability is critical as it enables local attackers to exploit the FileStore configuration in Apache Tomcat, potentially leading to a privilege escalation scenario.

Technical Details of CVE-2022-23181

This section delves into the specific technical aspects of the CVE-2022-23181 vulnerability.

Vulnerability Description

The vulnerability arises due to a time of check, time of use vulnerability introduced by the fix for CVE-2020-9484 in Apache Tomcat. It specifically affects instances where Tomcat is configured to persist sessions using FileStore.

Affected Systems and Versions

Apache Tomcat versions 8.5.55 to 8.5.73, 9.0.35 to 9.0.56, 10.0.0-M5 to 10.0.14, and 10.1.0-M1 to 10.1.0-M8 are impacted by CVE-2022-23181.

Exploitation Mechanism

Local attackers can exploit this vulnerability by leveraging the FileStore configuration in Apache Tomcat to carry out actions with elevated privileges.

Mitigation and Prevention

To address CVE-2022-23181, immediate steps should be taken, followed by long-term security practices and regular patching and updates.

Immediate Steps to Take

Organizations should review their Apache Tomcat configurations, especially those involving FileStore, and apply relevant patches promptly.

Long-Term Security Practices

Implementing least privilege principles, conducting regular security assessments, and monitoring system activity can enhance long-term security.

Patching and Updates

Stay informed about security advisories related to Apache Tomcat and promptly apply patches and updates to mitigate the risk of exploitation.