CVE-2018-6293 in Web Client
Summary
by MITRE
Arbitrary File Read in Saperion Web Client version 7.5.2 83166.
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Analysis
by VulDB Data Team • 01/04/2020
The vulnerability identified as CVE-2018-6293 represents a critical arbitrary file read flaw within the Saperion Web Client version 7.5.2 build 83166. This vulnerability falls under the category of insecure direct object reference issues and can be classified as CWE-22 according to the Common Weakness Enumeration catalog. The flaw exists in the web client component that handles file operations, allowing unauthorized access to files within the application's file system through improper input validation mechanisms.
The technical implementation of this vulnerability stems from insufficient validation of user-supplied input parameters that are directly used to construct file paths or names for read operations. When a user provides a crafted input parameter to the web client interface, the application fails to properly sanitize or validate this input before using it to access files on the server. This allows an attacker to traverse the file system and read arbitrary files that should normally be protected or restricted from access. The vulnerability specifically affects the web client component, meaning that an attacker could potentially access sensitive configuration files, database credentials, application source code, or other confidential data stored on the server.
The operational impact of this vulnerability is severe and multifaceted. An attacker who successfully exploits this flaw can gain access to sensitive information that may include database connection strings, application configuration files, user credentials, and potentially even source code repositories. This arbitrary file read capability can lead to information disclosure, privilege escalation, and ultimately system compromise. The vulnerability can be exploited through web-based attacks without requiring any special privileges or authentication, making it particularly dangerous in environments where the web client is accessible to unauthenticated users. The attack surface extends to any file that the web client process has read permissions for, potentially including system configuration files, log files, and application data files.
Mitigation strategies for this vulnerability should focus on implementing proper input validation and sanitization mechanisms. The primary defense involves validating all user-supplied input parameters against a whitelist of allowed values or implementing proper path traversal prevention techniques. Organizations should ensure that the Saperion Web Client is updated to the latest version that addresses this vulnerability, as vendors typically release patches to resolve such security flaws. Additionally, implementing proper access controls and least privilege principles can limit the damage that could result from exploitation. Network segmentation and monitoring for suspicious file access patterns can help detect potential exploitation attempts. The vulnerability aligns with ATT&CK technique T1083 (File and Directory Discovery) and T1566 (Phishing) as attackers may use this vulnerability to gather intelligence about the target environment. Security teams should also implement web application firewalls and input validation rules to prevent malicious input from reaching the vulnerable application components. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in other web applications within the organization's infrastructure.
The vulnerability demonstrates the critical importance of proper input validation in web applications and serves as a reminder of how seemingly simple flaws can lead to significant security breaches. Organizations should maintain updated vulnerability management processes and ensure that all third-party applications are regularly assessed for security weaknesses. The presence of such vulnerabilities in web clients highlights the need for comprehensive security testing throughout the software development lifecycle, including security code reviews and automated vulnerability scanning.