CVE-2016-10653 in xd-testing
Summary
by MITRE
xd-testing is a testing library for cross-device (XD) web applications. xd-testing downloads binary resources over HTTP, which leaves it vulnerable to MITM attacks. It may be possible to cause remote code execution (RCE) by swapping out the requested binary with an attacker controlled binary if the attacker is on the network or positioned in between the user and the remote server.
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Analysis
by VulDB Data Team • 02/14/2020
The xd-testing library represents a critical security vulnerability in cross-device web application testing frameworks that exposes organizations to significant remote code execution risks. This testing library, designed to facilitate cross-device web application development, creates a dangerous attack surface by implementing insecure binary download mechanisms that operate over unencrypted HTTP protocols. The fundamental flaw lies in the library's failure to implement proper cryptographic verification mechanisms for downloaded binary resources, creating an environment where man-in-the-middle attackers can seamlessly replace legitimate binaries with malicious counterparts without detection. This vulnerability directly violates security best practices outlined in the OWASP Top Ten and aligns with CWE-319, which specifically addresses the exposure of sensitive information through improper use of network protocols. The attack vector is particularly concerning as it requires minimal network positioning to execute successfully, making it accessible to attackers who merely need to be on the same network segment or positioned between the target system and remote servers.
The operational impact of this vulnerability extends far beyond simple data interception, as it creates a pathway for complete system compromise through remote code execution capabilities. When an attacker successfully substitutes a legitimate binary with a malicious one, they gain the ability to execute arbitrary code on the target system with the privileges of the user running the xd-testing library. This represents a severe escalation from the initial MITM attack surface, as the vulnerability enables persistent access and potential lateral movement within network environments. The threat model aligns with ATT&CK technique T1059.007 for remote code execution and T1566 for credential access through network manipulation. Organizations utilizing this library face potential data breaches, system compromise, and unauthorized access to sensitive information, particularly in environments where network security controls are insufficient or where the library is used in production environments rather than isolated testing scenarios.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term architectural improvements to prevent similar issues in development toolchains. The most effective immediate solution involves implementing secure transport mechanisms through HTTPS with certificate pinning, ensuring that all binary downloads occur over encrypted channels with proper certificate validation. Organizations should also implement binary integrity verification mechanisms such as cryptographic checksums or digital signatures to validate downloaded resources against known good values. The remediation approach should follow NIST SP 800-53 security controls, particularly those addressing secure configuration and network protection. Additionally, development teams must establish secure coding practices that prohibit the use of unencrypted protocols for downloading critical components, and organizations should consider implementing network segmentation and monitoring to detect anomalous binary download activities. Regular security assessments of development dependencies and toolchains should be conducted to identify similar vulnerabilities in other third-party libraries, ensuring comprehensive protection against supply chain attacks that exploit insecure download mechanisms.