CVE-2017-1000208 : Security Advisory and Response

A vulnerability in parsing yaml Open-API specifications using Swagger-Parser's version 1.0.30 or lower can lead to arbitrary code execution. This vulnerability affects the 'generate' and 'validate' commands in swagger-codegen version 2.2.2 or lower, allowing maliciously crafted yaml specifications to execute code.

Understanding CVE-2017-1000208

This CVE involves a security issue in Swagger-Parser's yaml parsing functionality, potentially resulting in arbitrary code execution.

What is CVE-2017-1000208?

The vulnerability arises when parsing yaml Open-API specifications with Swagger-Parser's version 1.0.30 or earlier, enabling the execution of arbitrary code by processing a specially crafted yaml specification. Notably, this flaw impacts the 'generate' and 'validate' commands in swagger-codegen version 2.2.2 or lower, where executing these commands on a carefully crafted yaml specification can result in arbitrary code execution.

The Impact of CVE-2017-1000208

The vulnerability allows threat actors to execute arbitrary code by manipulating yaml specifications, posing a significant risk to systems utilizing affected versions of Swagger-Parser and swagger-codegen.

Technical Details of CVE-2017-1000208

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The vulnerability in Swagger-Parser's yaml parsing functionality allows for the execution of arbitrary code when processing maliciously crafted yaml Open-API specifications.

Affected Systems and Versions

Swagger-Parser version 1.0.30 or lower
Swagger-Codegen version 2.2.2 or lower

Exploitation Mechanism

Threat actors can exploit this vulnerability by providing a maliciously crafted yaml specification to the 'generate' and 'validate' commands in swagger-codegen, triggering arbitrary code execution.

Mitigation and Prevention

Protecting systems from CVE-2017-1000208 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Swagger-Parser to version 1.0.31 or higher
Upgrade swagger-codegen to version 2.2.3 or newer
Avoid processing yaml specifications from untrusted sources

Long-Term Security Practices

Regularly monitor for security advisories and updates from Swagger-Parser and swagger-codegen
Implement secure coding practices to mitigate code execution vulnerabilities

Patching and Updates

Apply patches provided by the respective vendors promptly
Stay informed about security patches and updates to address vulnerabilities effectively