CVE-2015-2210 in Netscaler Application Delivery Controller
Summary
by MITRE
The help window in Epicor CRS Retail Store before 3.2.03.01.008 allows local users to execute arbitrary code by injecting Javascript into the window source to create a button that spawns a command shell.
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Analysis
by VulDB Data Team • 03/24/2019
The vulnerability identified as CVE-2015-2210 represents a critical code execution flaw within the Epicor CRS Retail Store software version 3.2.03.01.008 and earlier. This issue resides in the help window functionality, which serves as a user interface component designed to provide assistance and information to retail store personnel. The vulnerability stems from inadequate input validation and sanitization mechanisms within the help window's source code processing, creating an environment where malicious JavaScript code can be injected and subsequently executed with the privileges of the running application.
The technical implementation of this vulnerability involves the exploitation of a classic cross-site scripting (XSS) vector within the application's help window component. When local users manipulate the window source input, they can inject malicious javascript code that gets rendered within the help window context. This specific implementation creates a button element that, when clicked by an unsuspecting user, triggers the execution of a command shell through the application's underlying system call mechanisms. The vulnerability demonstrates characteristics consistent with CWE-79 - Cross-Site Scripting and CWE-94 - Improper Control of Generation of Code, where user-controllable input directly influences code generation and execution paths within the application.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it provides attackers with complete control over the affected retail store system. Local users who can access the help window functionality can leverage this vulnerability to execute arbitrary commands with the privileges of the application process, potentially leading to full system compromise. The attack vector is particularly concerning because it requires minimal technical expertise to exploit, making it accessible to both malicious insiders and external attackers who gain local access to the system. This vulnerability essentially transforms a legitimate help functionality into a weaponized attack surface that can be used to establish persistent access, exfiltrate sensitive retail data, or disrupt business operations.
Mitigation strategies for CVE-2015-2210 should prioritize immediate software updates to version 3.2.03.01.008 or later, which contain proper input sanitization and validation mechanisms. Organizations should implement strict input validation for all user-controllable data within help and documentation components, employing proper encoding techniques to prevent javascript injection. The principle of least privilege should be enforced by ensuring that retail store applications run with minimal necessary permissions, limiting the potential damage from successful exploitation. Network segmentation and monitoring solutions should be deployed to detect unusual command execution patterns that may indicate exploitation attempts. Additionally, regular security assessments should include testing for similar injection vulnerabilities within other application components, as this vulnerability demonstrates a broader pattern of insufficient input validation that could affect other parts of the Epicor CRS Retail Store system. The attack pattern aligns with techniques described in the MITRE ATT&CK framework under T1059 - Command and Scripting Interpreter, where adversaries leverage legitimate system tools to execute malicious code through compromised application interfaces.