CVE-2018-7489 : Exploit Details and Defense Strategies
CVE-2018-7489 allows remote code execution in FasterXML jackson-databind prior to versions 2.7.9.3, 2.8.11.1, and 2.9.5. Learn about the impact, affected systems, exploitation, and mitigation steps.
FasterXML jackson-databind versions prior to 2.7.9.3, 2.8.x prior to 2.8.11.1, and 2.9.x prior to 2.9.5 have a vulnerability that allows remote code execution without authentication. This CVE stems from an incomplete patch for the CVE-2017-7525 deserialization vulnerability.
Understanding CVE-2018-7489
This CVE involves a critical vulnerability in FasterXML jackson-databind that can be exploited for remote code execution.
What is CVE-2018-7489?
CVE-2018-7489 is a security flaw in FasterXML jackson-databind that enables attackers to execute remote code without requiring authentication. The vulnerability arises due to an inadequate fix for a previous deserialization vulnerability.
The Impact of CVE-2018-7489
The vulnerability allows attackers to execute remote code without authentication by providing manipulated JSON input to the readValue method of the ObjectMapper. It bypasses a blacklist and remains effective even in the presence of c3p0 libraries in the classpath.
Technical Details of CVE-2018-7489
FasterXML jackson-databind vulnerability details.
Vulnerability Description
The vulnerability in FasterXML jackson-databind allows unauthenticated remote code execution due to an incomplete fix for a deserialization flaw.
Affected Systems and Versions
- Versions prior to 2.7.9.3, 2.8.x before 2.8.11.1, and 2.9.x before 2.9.5 are affected.
Exploitation Mechanism
- Attackers exploit the vulnerability by providing manipulated JSON input to the readValue method of the ObjectMapper.
- The vulnerability bypasses a blacklist and remains effective even with c3p0 libraries present in the classpath.
Mitigation and Prevention
Protecting systems from CVE-2018-7489.
Immediate Steps to Take
- Update FasterXML jackson-databind to versions 2.7.9.3, 2.8.11.1, or 2.9.5 to mitigate the vulnerability.
- Implement network security measures to restrict access to vulnerable components.
Long-Term Security Practices
- Regularly update software and libraries to patch known vulnerabilities.
- Conduct security audits and code reviews to identify and address potential security issues.
Patching and Updates
- Apply security patches provided by FasterXML to address the CVE-2018-7489 vulnerability.