CVE-2022-22387 in Application Gateway
Summary
by MITRE • 09/28/2022
IBM Application Gateway is vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session. IBM X-Force ID: 221965.
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Analysis
by VulDB Data Team • 09/29/2022
IBM Application Gateway contains a cross-site scripting vulnerability that represents a critical security flaw in the web user interface. This vulnerability stems from insufficient input validation and output encoding mechanisms within the application's web components. The flaw allows malicious actors to inject arbitrary JavaScript code through user-controllable input fields or parameters within the web interface. The vulnerability is classified under CWE-79 which specifically addresses cross-site scripting attacks where web applications fail to properly sanitize user inputs before rendering them in web pages.
The technical exploitation of this vulnerability occurs when an attacker crafts malicious input that gets processed by the IBM Application Gateway's web interface without proper sanitization. When authenticated users view pages containing the injected JavaScript code, the malicious script executes in the context of their browser session. This creates a persistent threat where attackers can manipulate the web application's behavior, potentially capturing session cookies, credentials, or other sensitive information transmitted within the trusted session. The vulnerability is particularly dangerous because it leverages the trust relationship between the user and the application, allowing attackers to perform actions as if they were legitimate users.
The operational impact of this vulnerability extends beyond simple data theft. Attackers can exploit the XSS flaw to conduct session hijacking, perform unauthorized transactions, or redirect users to malicious websites. The compromised session tokens could enable attackers to maintain persistent access to the application gateway, potentially gaining administrative privileges or access to underlying systems. This vulnerability affects the integrity and confidentiality of the entire application gateway environment, as it undermines the trust model that users place in the secure web interface.
Organizations should implement immediate mitigations including input validation and output encoding to prevent XSS attacks. The recommended approach involves implementing proper HTML escaping for all user-controllable inputs and ensuring that the web application framework properly sanitizes all data before rendering it in the browser. Additionally, implementing Content Security Policy headers can provide an additional layer of protection against script injection attacks. Security teams should conduct thorough penetration testing to identify all potential injection points within the web interface and ensure that all user inputs are properly validated and sanitized. The vulnerability aligns with ATT&CK technique T1059.007 which covers scripting through web shells and includes the use of XSS to establish persistent access to web applications. Organizations should also consider implementing web application firewalls and monitoring for suspicious input patterns that could indicate attempted exploitation of this vulnerability.