CVE-2017-4995 : What You Need to Know

A vulnerability has been identified in Pivotal Spring Security versions 4.2.0.RELEASE through 4.2.2.RELEASE and Spring Security version 5.0.0.M1. This vulnerability involves a deserialization issue in Jackson when default typing is enabled. Learn more about the impact, technical details, and mitigation steps related to this CVE.

Understanding CVE-2017-4995

This section provides an overview of the vulnerability and its implications.

What is CVE-2017-4995?

CVE-2017-4995 is a deserialization vulnerability in Pivotal Spring Security and Spring Security that could lead to arbitrary code execution when default typing is enabled in Jackson.

The Impact of CVE-2017-4995

The vulnerability allows for arbitrary code execution under specific conditions, posing a significant security risk to affected systems.

Technical Details of CVE-2017-4995

Explore the technical aspects of the vulnerability in this section.

Vulnerability Description

The issue arises from a deserialization vulnerability in Jackson, which could be exploited for arbitrary code execution.

Affected Systems and Versions

Spring Security 4.2.0.RELEASE through 4.2.2.RELEASE
Spring Security 5.0.0.M1

Exploitation Mechanism

Spring Security's Jackson support must be utilized with default typing enabled
Untrusted data deserialized using Jackson
Presence of an unknown "deserialization gadget" on the classpath

Mitigation and Prevention

Discover the steps to mitigate and prevent exploitation of this vulnerability.

Immediate Steps to Take

Disable default typing in Jackson if not required
Ensure trusted sources for deserialization
Regularly update Jackson to the latest version

Long-Term Security Practices

Implement input validation to prevent malicious data
Conduct regular security audits and code reviews
Educate developers on secure coding practices

Patching and Updates

Apply patches provided by Jackson and Spring Security
Stay informed about security updates and advisories