CVE-2023-5079 in LeCloud Application
Summary
by MITRE • 11/09/2023
Lenovo LeCloud App improper input validation allows attackers to access arbitrary components and arbitrary file downloads, which could result in information disclosure.
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Analysis
by VulDB Data Team • 11/09/2023
The vulnerability identified as CVE-2023-5079 affects the Lenovo LeCloud application, representing a critical security flaw in the mobile application ecosystem that enables unauthorized access to sensitive system components. This vulnerability stems from inadequate input validation mechanisms within the application's codebase, creating a pathway for malicious actors to exploit the software's trust model. The flaw specifically manifests in the application's handling of user-supplied data, where insufficient sanitization allows attackers to manipulate input parameters and gain access to components that should remain protected. The vulnerability's classification aligns with CWE-20, which describes improper input validation as a fundamental weakness that enables various attack vectors including arbitrary file access and information disclosure. Attackers can leverage this weakness to bypass intended access controls and retrieve sensitive data from the device's file system through the application's interface.
The technical exploitation of this vulnerability occurs when the application fails to properly validate or sanitize user inputs before processing them within the application's internal logic. This allows attackers to craft malicious input sequences that manipulate the application's file handling routines and directory traversal mechanisms. The improper validation creates a condition where user-supplied parameters can directly influence the application's behavior, potentially enabling arbitrary file downloads or access to system components that are normally restricted. This type of vulnerability represents a significant concern within the mobile application security landscape, as it provides attackers with direct access to device resources that could contain sensitive personal information, configuration data, or other confidential materials. The vulnerability's impact is particularly severe because it enables information disclosure without requiring elevated privileges or complex exploitation techniques.
From an operational perspective, the exploitation of CVE-2023-5079 could result in substantial data breaches and privacy violations for users of the Lenovo LeCloud application. The vulnerability's ability to facilitate arbitrary file downloads means that attackers could potentially access personal files, device configuration data, application logs, or other sensitive information stored on the mobile device. This information disclosure could lead to identity theft, financial fraud, or other malicious activities that exploit the compromised data. The vulnerability's presence in a widely-used application like Lenovo LeCloud amplifies its potential impact, as it could affect thousands or millions of users simultaneously. Organizations and individuals using the application become vulnerable to targeted attacks that could compromise their device security and privacy, making this a critical concern for both enterprise and personal device security. The vulnerability's exploitation aligns with ATT&CK technique T1074 which involves data staging and collection through compromised applications.
The recommended mitigation strategies for this vulnerability involve immediate application updates from Lenovo to address the input validation flaws and implement proper sanitization of user inputs. Security patches should include enhanced validation mechanisms that reject or sanitize potentially malicious input before processing, preventing the exploitation of directory traversal or arbitrary file access patterns. Organizations should implement network monitoring to detect unusual file access patterns or data exfiltration attempts that could indicate exploitation of this vulnerability. Users should be advised to avoid downloading or updating the application until patches are available, and to regularly update their devices to ensure all security fixes are applied. The vulnerability's remediation should follow established security practices including input validation, output encoding, and principle of least privilege enforcement. Security teams should also conduct vulnerability assessments to identify similar issues in other applications and implement comprehensive security testing procedures that include input validation testing. The fix should incorporate proper error handling mechanisms that prevent information leakage through error messages or response content that could aid attackers in understanding the system's internal structure.