CVE-2018-17865 in J2EE Engine
Summary
by MITRE • 08/10/2021
** UNSUPPORTED WHEN ASSIGNED ** A cross-site scripting (XSS) vulnerability in SAP J2EE Engine 7.01 allows remote attackers to inject arbitrary web script via the wsdlPath parameter to /ctcprotocol/Protocol. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.
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Analysis
by VulDB Data Team • 07/02/2024
This vulnerability represents a classic cross-site scripting flaw in SAP's J2EE Engine component that could enable remote attackers to execute malicious web scripts within the context of affected applications. The specific vector involves manipulation of the wsdlPath parameter through the /ctcprotocol/Protocol endpoint, which demonstrates how improperly validated input can create persistent security weaknesses in enterprise web applications. The vulnerability's classification as a reflected XSS issue indicates that the malicious script is executed when a user accesses a specially crafted URL containing the malicious payload, making it particularly dangerous in environments where users might inadvertently click on compromised links or be redirected to malicious pages.
The technical exploitation of this vulnerability requires attackers to craft malicious input that gets processed and returned in the application's response without proper sanitization or encoding. In SAP J2EE Engine versions 7.01 and potentially other unsupported releases, the wsdlPath parameter handling lacks adequate validation mechanisms to prevent injection of malicious script code. This type of vulnerability falls under CWE-79 which specifically addresses cross-site scripting weaknesses where untrusted data is incorporated into web pages without proper sanitization. The fact that this vulnerability only affects unsupported products highlights a critical security gap where organizations may be running legacy systems with known vulnerabilities that no longer receive security updates or patches from the vendor.
The operational impact of this vulnerability extends beyond simple script execution as it could enable attackers to steal session cookies, perform unauthorized actions on behalf of authenticated users, or redirect victims to malicious sites. In enterprise environments running SAP systems, such vulnerabilities represent significant risks to data integrity and confidentiality since they can be exploited by attackers who do not require authentication to initiate the attack. The attack surface is particularly concerning given that SAP systems often handle sensitive business data and may be integrated with other enterprise applications, potentially allowing for broader compromise through chained attacks. This vulnerability aligns with ATT&CK technique T1566 which focuses on spearphishing attacks and social engineering methods that leverage web-based exploits to gain initial access to target systems.
Organizations should recognize that this vulnerability exists in unsupported software versions and therefore lacks official security patches or mitigation guidance from SAP. The recommended approach for addressing such legacy vulnerabilities involves implementing network-level controls such as web application firewalls, input validation at multiple layers, and comprehensive monitoring for suspicious activities. However, the most effective long-term solution requires migrating away from unsupported systems to current, supported versions that receive regular security updates and maintain vendor support. Security teams should also consider implementing additional monitoring and detection capabilities to identify potential exploitation attempts and establish incident response procedures for handling such vulnerabilities in legacy environments where immediate remediation is not possible.