CVE-2017-0905 in Recurly Client Ruby Library
Summary
by MITRE
The Recurly Client Ruby Library before 2.0.13, 2.1.11, 2.2.5, 2.3.10, 2.4.11, 2.5.4, 2.6.3, 2.7.8, 2.8.2, 2.9.2, 2.10.4, 2.11.3 is vulnerable to a Server-Side Request Forgery vulnerability in the "Resource#find" method that could result in compromise of API keys or other critical resources.
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Analysis
by VulDB Data Team • 01/10/2023
The vulnerability identified as CVE-2017-0905 affects the Recurly Client Ruby Library, a widely used software development kit for integrating with the Recurly payment processing platform. This issue manifests in versions prior to specific patches across multiple release branches, creating a persistent security risk for organizations relying on the library for their payment infrastructure. The vulnerability stems from improper input validation within the Resource#find method, which serves as a core functionality for retrieving payment-related resources from the Recurly API. The flaw allows malicious actors to manipulate the library's behavior through crafted input parameters, potentially leading to unauthorized access to sensitive payment data and system resources. This type of vulnerability is particularly dangerous in payment processing environments where API keys and customer financial information are routinely handled, making the impact severe for any organization utilizing affected library versions.
The technical implementation of this Server-Side Request Forgery vulnerability occurs when the Resource#find method processes user-supplied input without adequate sanitization or validation. Attackers can exploit this weakness by providing malicious URLs or network addresses as parameters to the find method, causing the library to make unintended requests to internal systems or external malicious endpoints. The vulnerability falls under CWE-918, which specifically addresses Server-Side Request Forgery, and aligns with ATT&CK technique T1071.004 for application layer protocol manipulation. When exploited, the vulnerability allows attackers to bypass normal network restrictions and potentially access internal resources that would typically be protected by firewalls or network segmentation. The library's failure to properly validate and sanitize input parameters creates a pathway for attackers to manipulate the underlying HTTP requests, potentially leading to data exfiltration or further exploitation of the compromised system.
The operational impact of this vulnerability extends beyond simple data theft, as it can enable attackers to compromise entire payment processing workflows and potentially gain access to sensitive customer information stored within Recurly systems. Organizations using affected library versions face risks of unauthorized API key access, which could result in financial losses, regulatory compliance violations, and reputational damage. The vulnerability is particularly concerning because it affects multiple major release branches of the library, indicating a widespread exposure across different development environments and production systems. Security incidents resulting from this vulnerability could trigger extensive forensic investigations, regulatory penalties under payment card industry standards, and require costly remediation efforts including library updates, code reviews, and potentially API key rotation. The attack surface is broad as any application utilizing the vulnerable Recurly library for resource retrieval operations could be exploited, making this a critical vulnerability requiring immediate attention from security teams.
Mitigation strategies for CVE-2017-0905 focus on immediate library version upgrades to patched releases, specifically targeting versions 2.0.13, 2.1.11, 2.2.5, 2.3.10, 2.4.11, 2.5.4, 2.6.3, 2.7.8, 2.8.2, 2.9.2, 2.10.4, and 2.11.3. Organizations should implement comprehensive patch management procedures to ensure all affected applications are updated promptly and verify that the updates have been successfully deployed. Network-level protections such as firewall rules and proxy configurations can provide additional defense-in-depth measures by restricting outbound requests from applications using the Recurly library. Input validation should be implemented at multiple layers, including application-level sanitization of parameters passed to the Resource#find method, and regular security testing including penetration testing and vulnerability scanning. Organizations should also conduct thorough code reviews to identify any custom implementations that might be using the vulnerable library functionality, and establish monitoring procedures to detect unusual network activity that might indicate exploitation attempts. The remediation process should include comprehensive testing of updated library versions in staging environments to ensure no regression issues are introduced while maintaining the security posture against this specific Server-Side Request Forgery vulnerability.