CVE-2022-27656 in Web Dispatcher
Summary
by MITRE • 05/11/2022
The Web administration UI of SAP Web Dispatcher and the Internet Communication Manager (ICM) does not sufficiently encode user-controlled inputs, resulting in Cross-Site Scripting (XSS) vulnerability.
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Analysis
by VulDB Data Team • 05/14/2022
The vulnerability identified as CVE-2022-27656 affects the web administration user interface of SAP Web Dispatcher and the Internet Communication Manager components, representing a critical security flaw that enables unauthorized execution of malicious scripts within the context of a victim's browser. This issue stems from insufficient input validation and output encoding mechanisms within the web-based administrative interfaces, which are commonly used by system administrators to manage and configure SAP systems. The vulnerability specifically impacts the web administration UI of SAP Web Dispatcher and ICM, which are integral components of SAP NetWeaver and other SAP products, making it particularly concerning given the widespread deployment of these systems across enterprise environments. The flaw exists in the handling of user-controllable input parameters that are directly reflected in the web interface without proper sanitization or encoding, creating an avenue for attackers to inject malicious scripts that can execute in the context of authenticated users.
The technical nature of this vulnerability aligns with CWE-79, which describes Cross-Site Scripting vulnerabilities that occur when untrusted data is incorporated into web pages without proper validation or encoding. Attackers can exploit this weakness by crafting malicious input strings that contain script code, which when processed by the vulnerable web interface, gets executed in the browsers of legitimate users who access the administration UI. The vulnerability is particularly dangerous because it can be exploited by both unauthenticated and authenticated attackers, depending on the specific configuration and access controls of the affected system. The XSS flaw manifests when user-supplied data flows through the application's input handling mechanisms and is subsequently rendered in the web interface without appropriate HTML encoding or JavaScript escaping. This allows attackers to inject malicious payloads that can perform actions such as stealing session cookies, redirecting users to malicious sites, defacing web pages, or executing arbitrary commands within the context of the victim's browser session.
The operational impact of CVE-2022-27656 extends beyond simple script execution, as it can enable attackers to gain unauthorized access to sensitive administrative functions and potentially escalate privileges within the SAP environment. An attacker who successfully exploits this vulnerability can leverage the administrative interface to manipulate system configurations, access restricted data, or perform operations that should only be available to authorized administrators. The vulnerability is particularly concerning in enterprise environments where SAP systems are extensively used for business-critical applications, as it can lead to complete system compromise and data breaches. Attackers can use this vulnerability to establish persistent access to the administration interface, monitor user activities, steal sensitive information, or even gain control over the underlying SAP system. The impact is further amplified by the fact that many organizations rely heavily on these administration interfaces for day-to-day system management, making the compromise of such interfaces particularly damaging to overall system security and business continuity.
Organizations should implement immediate mitigations including input validation and output encoding controls to prevent the execution of malicious scripts in the web administration interfaces of SAP Web Dispatcher and ICM components. The recommended approach involves implementing comprehensive input sanitization mechanisms that validate and filter all user-controllable inputs before they are processed or rendered in the web interface. Security patches provided by SAP should be applied immediately to address the vulnerability, as the company has released updates specifically designed to correct the insufficient encoding issues in the affected components. Additionally, organizations should consider implementing web application firewalls that can detect and block malicious script injection attempts, as well as conduct regular security assessments of their SAP environments to identify and remediate similar vulnerabilities. Network segmentation and access controls should be strengthened to limit exposure of the administration interfaces to only authorized personnel and systems. The implementation of proper logging and monitoring mechanisms is also crucial to detect potential exploitation attempts and respond to security incidents in a timely manner, as this vulnerability can be used as an initial access vector for more sophisticated attacks within the SAP ecosystem.