CVE-2020-15958 in 1CRM System
Summary
by MITRE
An issue was discovered in 1CRM System through 8.6.7. An insecure direct object reference to internally stored files allows a remote attacker to access various sensitive information via an unauthenticated request with a predictable URL.
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Analysis
by VulDB Data Team • 09/21/2020
The vulnerability identified as CVE-2020-15958 represents a critical insecure direct object reference flaw within the 1CRM System version 8.6.7 and earlier. This weakness stems from the application's failure to properly validate user input when accessing internal file resources through predictable URL patterns. The vulnerability allows remote attackers to bypass authentication mechanisms and directly access sensitive data by constructing appropriate URLs that reference internal file paths. The issue manifests when the system accepts user-supplied identifiers without proper authorization checks, enabling unauthorized access to files that should remain protected within the application's internal storage mechanisms.
The technical implementation of this vulnerability aligns with CWE-284, which describes insecure direct object references where applications grant access to internal resources without proper authorization validation. The flaw operates by exploiting predictable URL structures that map directly to internal file system locations, allowing attackers to enumerate and access files through simple URL manipulation. This type of vulnerability falls under the broader category of access control weaknesses and specifically relates to improper authorization checks that should validate whether the requesting user has legitimate access rights to the requested resource. The vulnerability is particularly dangerous because it requires no authentication credentials to exploit, making it accessible to any remote attacker who can guess or discover the appropriate URL patterns.
The operational impact of CVE-2020-15958 extends beyond simple data exposure to encompass potential system compromise and information disclosure. Attackers can access sensitive customer data, system configuration files, database credentials, and other internal resources that should remain protected. This vulnerability can lead to unauthorized data access, potential data exfiltration, and may serve as a stepping stone for further exploitation within the target environment. The predictable nature of the URL patterns means that automated scanning tools can quickly identify and exploit this vulnerability across multiple systems. The impact is particularly severe for CRM systems like 1CRM which handle sensitive customer information, business data, and potentially financial records, making the exposure of such data a significant concern for organizations using the affected software versions.
Mitigation strategies for this vulnerability must address both the immediate access control flaws and implement comprehensive security measures to prevent future occurrences. Organizations should implement proper input validation and authorization checks for all file access requests, ensuring that user-supplied identifiers are properly verified against legitimate access permissions. The solution involves implementing a robust access control mechanism that validates user credentials and authorization levels before granting access to any internal resources. Security controls should include randomizing file access URLs, implementing proper session management, and ensuring that all internal file references are properly abstracted from direct user access. Additionally, organizations should conduct regular security assessments to identify and remediate similar vulnerabilities within their application frameworks and ensure that access control mechanisms are properly configured according to security best practices and industry standards such as those recommended by the OWASP Top Ten project. The remediation process should also include implementing proper logging and monitoring to detect unauthorized access attempts and establishing clear procedures for validating and sanitizing all user inputs before processing.