CVE-2023-48255 in Nexo Cordless Nutrunner
Summary
by MITRE • 01/10/2024
The vulnerability allows an unauthenticated remote attacker to send malicious network requests containing arbitrary client-side script code and obtain its execution inside a victim’s session via a crafted URL, HTTP request, or simply by waiting for the victim to view the poisoned log.
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Analysis
by VulDB Data Team • 01/28/2024
This vulnerability represents a critical cross-site scripting flaw that enables remote attackers to execute arbitrary client-side scripts within victim sessions without requiring authentication. The vulnerability stems from insufficient input validation and output encoding mechanisms within the affected application's processing of user-supplied data. Attackers can craft malicious URLs or HTTP requests containing malicious script payloads that, when processed by the application, get executed in the context of authenticated users' browsers. The attack vector is particularly dangerous because it can be delivered through various means including crafted web links, poisoned log files, or malicious HTTP requests that appear legitimate to the application's processing logic.
The technical exploitation occurs when the application fails to properly sanitize user input before rendering it in web pages or log files. This creates an environment where attacker-controlled script code can be injected and subsequently executed within the victim's browser session. The vulnerability operates at the application layer and leverages the trust relationship between the user's browser and the vulnerable application. When victims interact with poisoned content, whether through direct navigation to malicious URLs or by viewing log files containing the injected payloads, the malicious scripts execute in the context of their authenticated sessions, potentially compromising session tokens, credentials, or other sensitive data.
From an operational impact perspective, this vulnerability can lead to complete session hijacking, privilege escalation, data theft, and unauthorized actions performed on behalf of victims. The attack requires no authentication and can be executed remotely, making it particularly dangerous for applications handling sensitive user data or administrative functions. The vulnerability affects the application's integrity and confidentiality by allowing attackers to manipulate user sessions and potentially gain access to restricted resources or perform unauthorized operations. The impact is amplified when the application processes log files or displays user-generated content without proper sanitization, as these scenarios provide multiple attack surfaces for exploitation.
Security mitigation strategies should focus on implementing comprehensive input validation, output encoding, and content security policy enforcement mechanisms. The application should sanitize all user-supplied input through strict validation and encoding before processing or displaying any data. Implementing proper content security policies can prevent execution of unauthorized scripts even if injection occurs. Regular security testing including dynamic and static analysis should be conducted to identify similar vulnerabilities. The vulnerability aligns with CWE-79 Cross-site Scripting and follows attack patterns described in the ATT&CK framework under T1566 Phishing and T1059 Command and Scripting Interpreter. Organizations should also implement web application firewalls, monitor for suspicious patterns in application logs, and ensure regular patching of affected components to prevent exploitation.