CVE-2022-22812 in spaceLYnk
Summary
by MITRE • 02/10/2022
A CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability exists that could cause a web session compromise when an attacker injects and then executes arbitrary malicious JavaScript code inside the target browser. Affected Product: spaceLYnk (V2.6.2 and prior), Wiser for KNX (formerly homeLYnk) (V2.6.2 and prior), fellerLYnk (V2.6.2 and prior)
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Analysis
by VulDB Data Team • 02/14/2022
This vulnerability represents a critical cross-site scripting flaw classified under CWE-79 which occurs when web applications fail to properly neutralize user input during web page generation. The affected products including spaceLYnk V2.6.2 and prior versions, Wiser for KNX formerly known as homeLYnk V2.6.2 and prior, and fellerLYnk V2.6.2 and prior all contain insufficient input validation mechanisms that allow malicious actors to inject arbitrary JavaScript code into web interfaces. The vulnerability specifically manifests when user-supplied data is directly incorporated into web page content without proper sanitization or encoding, creating an environment where attackers can execute malicious scripts within the context of legitimate user sessions.
The technical exploitation of this vulnerability enables attackers to perform session hijacking and other malicious activities by injecting JavaScript code that can capture user credentials, manipulate web interfaces, or redirect users to malicious sites. When an attacker successfully injects malicious code, it executes within the target browser's context, potentially compromising the entire web session and allowing unauthorized access to sensitive information or system functionality. This type of vulnerability falls under the ATT&CK technique T1059.007 for command and scripting interpreter and T1531 for credential access, as it provides attackers with the capability to execute arbitrary code and potentially extract session tokens or other authentication credentials.
The operational impact of this vulnerability extends beyond simple script execution to encompass complete session compromise and potential privilege escalation within the affected systems. Attackers can leverage this vulnerability to impersonate legitimate users, access restricted resources, and perform unauthorized actions within the web applications. The affected products are particularly vulnerable because they likely handle user input through web interfaces that do not properly encode or validate data before rendering it in HTML contexts. This creates a persistent threat vector that can be exploited by attackers with minimal technical expertise, as the vulnerability exists in the core web application logic rather than requiring complex attack chains.
Organizations utilizing these affected products should implement immediate mitigations including input validation, output encoding, and proper content security policies to prevent script injection attacks. The recommended approach involves implementing strict input sanitization mechanisms that filter or encode potentially malicious content before processing user data, combined with proper output encoding that ensures any user-supplied data rendered in web contexts cannot be interpreted as executable code. Additionally, implementing Content Security Policy headers can provide an additional layer of protection against script execution, while regular security updates and patches should be applied to address the underlying vulnerability. The remediation strategy should also include comprehensive security testing of web interfaces to identify and eliminate similar input validation gaps that could lead to other injection vulnerabilities.