CVE-2018-1000210 : What You Need to Know
Learn about CVE-2018-1000210 affecting YamlDotNet versions 4.3.2 and earlier, allowing code execution via insecure object reference. Find mitigation steps and update to version 5.0.0 for security.
YamlDotNet version 4.3.2 and earlier contain an Insecure Direct Object Reference vulnerability that allows for code execution within the running process when deserializing user-controlled types.
Understanding CVE-2018-1000210
This CVE involves a security vulnerability in YamlDotNet versions 4.3.2 and earlier, which has been addressed in version 5.0.0.
What is CVE-2018-1000210?
The vulnerability in YamlDotNet lies in the Deserializer.Deserialize() method, specifically in a line of code that blindly instantiates user-controlled types, potentially leading to code execution within the process. The attack is only exploitable if a specially-crafted YAML file is parsed.
The Impact of CVE-2018-1000210
This vulnerability could allow an attacker to execute arbitrary code within the context of the running process, posing a significant security risk to affected systems.
Technical Details of CVE-2018-1000210
YamlDotNet vulnerability details and affected systems.
Vulnerability Description
The vulnerability arises from the default behavior of the Deserializer.Deserialize() method, where user-controlled types are instantiated without proper validation, enabling potential code execution.
Affected Systems and Versions
- YamlDotNet versions 4.3.2 and earlier are affected by this vulnerability.
Exploitation Mechanism
- The vulnerability can be exploited by crafting a malicious YAML file that triggers the insecure object reference, leading to code execution.
Mitigation and Prevention
Steps to mitigate and prevent the exploitation of CVE-2018-1000210.
Immediate Steps to Take
- Upgrade to YamlDotNet version 5.0.0 or later to eliminate the vulnerability.
- Avoid parsing untrusted or specially-crafted YAML files.
Long-Term Security Practices
- Regularly update software and libraries to the latest secure versions.
- Implement input validation and sanitization to prevent similar vulnerabilities.
Patching and Updates
- Apply patches and updates provided by YamlDotNet to ensure the security of the system.