CVE-2023-4615 in LED Assistant
Summary
by MITRE • 09/04/2023
This vulnerability allows remote attackers to disclose sensitive information on affected installations of LG LED Assistant. Authentication is not required to exploit this vulnerability. The specific flaw exists within the /api/download/updateFile endpoint. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to disclose information in the context of the current user.
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Analysis
by VulDB Data Team • 09/30/2023
This vulnerability represents a critical path traversal flaw in LG LED Assistant software that enables unauthenticated remote information disclosure attacks. The vulnerability resides within the /api/download/updateFile endpoint where the application fails to properly validate user-supplied file paths before executing file operations. This design flaw creates an exploitable condition where malicious actors can manipulate input parameters to access files outside the intended directory structure. The absence of authentication requirements significantly amplifies the risk as any remote attacker can immediately exploit this weakness without needing valid credentials or privileged access.
The technical implementation of this vulnerability aligns with common path traversal attack patterns documented in CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory. When an attacker supplies a crafted path parameter to the updateFile endpoint, the application processes this input without adequate sanitization or validation, allowing arbitrary file access. This flaw operates at the application layer and can potentially expose sensitive system files, configuration data, or user information depending on the file permissions and system structure. The vulnerability's exploitation occurs during file operation execution where the application's path resolution mechanism fails to properly restrict access to authorized directories.
The operational impact of this vulnerability extends beyond simple information disclosure to potentially enable further attack vectors including system reconnaissance, credential theft, or privilege escalation. Attackers can leverage this weakness to gather intelligence about the target system, potentially identifying other vulnerable components or sensitive data stores. The vulnerability's remote exploitability means that attackers can target affected installations from anywhere on the internet without requiring physical access or network proximity. This characteristic makes the vulnerability particularly dangerous in enterprise environments where LG LED Assistant software may be deployed across multiple locations or accessible via corporate networks.
Security practitioners should implement immediate mitigations including input validation controls, path normalization, and access restriction mechanisms for the affected endpoint. The most effective immediate solution involves implementing strict input validation that prevents directory traversal sequences such as ../ or ..\ from being processed. Network segmentation and firewall rules should be configured to restrict access to the updateFile endpoint from untrusted networks. Additionally, implementing proper access controls and authentication mechanisms for this endpoint would provide defense in depth against exploitation attempts. Organizations should also conduct comprehensive vulnerability assessments to identify other potential path traversal vulnerabilities within their application codebases and ensure that all file operations include proper input validation and access control measures. The ATT&CK framework categorizes this vulnerability under T1083 (File and Directory Discovery) and T1566 (Phishing) as attackers may use the discovered information to craft more sophisticated social engineering campaigns or to identify additional attack surfaces for exploitation.