CVE-2022-24891 Explained : Impact and Mitigation
Learn about CVE-2022-24891, a cross-site scripting vulnerability in the ESAPI library caused by an incorrect regular expression. Find out the impact, affected versions, mitigation steps, and prevention measures.
A cross-site scripting vulnerability in the ESAPI (OWASP Enterprise Security API) due to an incorrect regular expression in the antisamy-esapi.xml configuration file prior to version 2.3.0.0 has been identified and fixed. Manual configuration file changes or updating to ESAPI 2.3.0.0 are recommended.
Understanding CVE-2022-24891
ESAPI, a web application security library, is prone to XSS attacks through the antisamy-esapi.xml configuration file. Versions <= 2.2.3.1 are affected by this vulnerability.
What is CVE-2022-24891?
The CVE-2022-24891 is a cross-site scripting vulnerability in the ESAPI library caused by an incorrect regular expression in the antisamy-esapi.xml configuration file.
The Impact of CVE-2022-24891
If exploited, this vulnerability could allow attackers to inject malicious scripts into web pages viewed by users, leading to potential data theft or unauthorized actions.
Technical Details of CVE-2022-24891
The vulnerability arises from improper input neutralization during web page generation, falling under CWE-79.
Vulnerability Description
Prior to ESAPI version 2.3.0.0, the incorrect regular expression in the antisamy-esapi.xml file permits unsanitized 'javascript:' URLs.
Affected Systems and Versions
The 'esapi-java-legacy' product versions <= 2.2.3.1 are vulnerable to this XSS flaw.
Exploitation Mechanism
Attackers can exploit this vulnerability by injecting malicious scripts into web pages that execute when unsuspecting users interact with the compromised pages.
Mitigation and Prevention
To address CVE-2022-24891, it is crucial to take immediate steps, follow long-term security practices, and apply available patches and updates.
Immediate Steps to Take
Manually edit the antisamy-esapi.xml configuration file to correct the regular expression for 'onsiteURL' or update to ESAPI 2.3.0.0.
Long-Term Security Practices
Regularly monitor for security advisories, conduct security assessments, and stay informed about updates related to the ESAPI library.
Patching and Updates
Refer to ESAPI maintainers' release notes and security bulletins for detailed remediation instructions.