CVE-2019-17531 Explained : Impact and Mitigation
Learn about CVE-2019-17531, a vulnerability in FasterXML jackson-databind versions 2.0.0 through 2.9.10 that allows attackers to execute harmful payloads. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
A vulnerability related to Polymorphic Typing was found in FasterXML jackson-databind versions 2.0.0 through 2.9.10. This CVE allows an attacker to execute a harmful payload by exploiting the Default Typing feature when the apache-log4j-extra jar file is present in the classpath.
Understanding CVE-2019-17531
This CVE involves a security issue in FasterXML jackson-databind versions 2.0.0 through 2.9.10 that can be exploited to execute malicious code.
What is CVE-2019-17531?
CVE-2019-17531 is a vulnerability in FasterXML jackson-databind versions 2.0.0 through 2.9.10 that allows attackers to execute harmful payloads by leveraging the Default Typing feature.
The Impact of CVE-2019-17531
The vulnerability can be exploited by attackers to execute malicious code if the Default Typing feature is enabled and the apache-log4j-extra jar file is present in the application's classpath.
Technical Details of CVE-2019-17531
This section provides more technical insights into the CVE.
Vulnerability Description
The vulnerability arises due to a Polymorphic Typing issue in FasterXML jackson-databind versions 2.0.0 through 2.9.10, allowing attackers to execute harmful payloads.
Affected Systems and Versions
- FasterXML jackson-databind versions 2.0.0 through 2.9.10
Exploitation Mechanism
- Default Typing feature enabled globally or for a specific property
- Presence of apache-log4j-extra (version 1.2.x) jar in the classpath
- Attacker providing a JNDI service for access
Mitigation and Prevention
Protect your systems from CVE-2019-17531 with the following measures:
Immediate Steps to Take
- Disable Default Typing if not required
- Remove the apache-log4j-extra jar file from the classpath
- Implement proper input validation and sanitization
Long-Term Security Practices
- Regularly update and patch software components
- Conduct security audits and code reviews
- Stay informed about security advisories and best practices
Patching and Updates
- Apply patches and updates provided by FasterXML for jackson-databind
- Monitor for any new developments or patches related to this CVE