CVE-2017-3203 : Security Advisory and Response
Learn about CVE-2017-3203, a vulnerability in Pivotal/Spring Spring-flex's AMF3 Java implementation allowing remote code execution. Find mitigation steps and prevention measures.
Pivotal/Spring Spring-flex's Action Message Format (AMF3) Java implementation is vulnerable to insecure deserialization.
Understanding CVE-2017-3203
Instead of using flash.utils.IExternalizable as recommended in the AMF3 specification, the Java implementations of AMF3 deserializers in Pivotal/Spring Spring-flex use java.io.Externalizable to derive class instances. This deviation could potentially allow a remote attacker to execute arbitrary code by sending serialized Java objects.
What is CVE-2017-3203?
The vulnerability in Pivotal/Spring Spring-flex's AMF3 Java implementation allows remote attackers to execute arbitrary code by manipulating RMI server connections.
The Impact of CVE-2017-3203
- Attackers can exploit the vulnerability to execute arbitrary code by sending maliciously crafted serialized Java objects.
- This could lead to unauthorized access, data theft, and potentially complete system compromise.
Technical Details of CVE-2017-3203
Pivotal/Spring Spring-flex's vulnerability in AMF3 Java implementation.
Vulnerability Description
The Java implementations of AMF3 deserializers in Pivotal/Spring Spring-flex use java.io.Externalizable instead of flash.utils.IExternalizable, enabling remote code execution.
Affected Systems and Versions
- Product: Spring-flex
- Vendor: Pivotal/Spring
- Versions affected: 0
Exploitation Mechanism
- Attackers can exploit the insecure deserialization to execute arbitrary code by manipulating RMI server connections.
Mitigation and Prevention
Steps to address and prevent CVE-2017-3203.
Immediate Steps to Take
- Apply patches or updates provided by Pivotal/Spring to fix the vulnerability.
- Implement network segmentation to limit the impact of potential attacks.
Long-Term Security Practices
- Regularly update and patch software to address security vulnerabilities.
- Implement secure coding practices to prevent insecure deserialization vulnerabilities.
Patching and Updates
- Stay informed about security advisories from Pivotal/Spring and apply patches promptly to secure systems.