Source: cve@mitre.org
Cross-site scripting (XSS) vulnerability in the Create Employee feature in Hybris Management Console (HMC) in SAP Hybris before 5.0.4.11, 5.1.0.x before 5.1.0.11, 5.1.1.x before 5.1.1.12, 5.2.0.x and 5.3.0.x before 5.3.0.10, 5.4.x before 5.4.0.9, 5.5.0.x before 5.5.0.9, 5.5.1.x before 5.5.1.10, 5.6.x before 5.6.0.8, and 5.7.x before 5.7.0.9 allows remote authenticated users to inject arbitrary web script or HTML via the Name field.
SAP Hybris Management Console (HMC) is vulnerable to a cross-site scripting (XSS) attack, allowing authenticated attackers to inject malicious scripts into the application. This vulnerability, stemming from improper input validation in the 'Create Employee' feature, can lead to session hijacking, data theft, and defacement of the application for authenticated users.
Step 1: Authentication: The attacker must first authenticate to the SAP Hybris Management Console (HMC) with valid credentials. This is a prerequisite for exploiting the vulnerability.
Step 2: Payload Injection: The attacker navigates to the 'Create Employee' feature within the HMC.
Step 3: Malicious Input: The attacker enters a specially crafted payload containing malicious JavaScript or HTML code into the 'Name' field. For example: <script>alert('XSS')</script> or <img src=x onerror=alert('XSS')>.
Step 4: Data Storage: The application stores the attacker's malicious input in the database without proper sanitization or encoding.
Step 5: Payload Execution: When another authenticated user views the employee's information (e.g., in a list or detail view), the application retrieves the stored data, including the attacker's malicious payload. The browser then renders the HTML, executing the injected JavaScript within the context of the user's session.
Step 6: Exploitation: The injected JavaScript executes, allowing the attacker to perform actions such as stealing session cookies, redirecting the user to a phishing site, or defacing the application.
The vulnerability lies within the 'Create Employee' feature of the SAP Hybris Management Console (HMC). Specifically, the application fails to properly sanitize user-supplied input in the 'Name' field. When an authenticated user submits a crafted payload containing malicious JavaScript or HTML tags within the 'Name' field, the application stores this input without proper encoding or filtering. Subsequently, when the employee's information is displayed within the HMC, the injected script executes in the context of the user's browser, enabling a variety of attacks. The root cause is a lack of input validation and output encoding (specifically, HTML entity encoding) on the 'Name' field, allowing for the execution of arbitrary code. The application trusts the user-provided input without proper sanitization, leading to the XSS vulnerability.
While no specific APTs are known to be actively exploiting this vulnerability, any threat actor with access to the HMC could leverage it. This type of vulnerability is often used in conjunction with other attacks. CISA KEV status: Not listed.
Monitor web server logs for suspicious HTTP requests containing JavaScript or HTML tags in the 'Name' field of employee creation requests.
Implement a Web Application Firewall (WAF) with rules to detect and block XSS payloads.
Analyze network traffic for unusual JavaScript execution or redirects originating from the HMC.
Monitor for changes in the HMC's user interface that could indicate defacement or malicious script injection.
Review application source code for proper input validation and output encoding in the 'Create Employee' feature.
Upgrade to a patched version of SAP Hybris that addresses the vulnerability. See the 'Affected Products' section for specific version information.
Implement robust input validation to sanitize all user-supplied input in the 'Name' field. This includes filtering out or encoding special characters that could be used in XSS attacks.
Implement output encoding (e.g., HTML entity encoding) to ensure that user-supplied data is properly encoded when displayed in the HMC.
Use a Content Security Policy (CSP) to restrict the sources from which the browser can load resources, mitigating the impact of XSS attacks.
Regularly scan the application for vulnerabilities using static and dynamic analysis tools.
Implement a Web Application Firewall (WAF) to detect and block XSS attacks.