CVE-2020-12487 in ABE
Summary
by MITRE • 12/17/2024
Due to the flaws in the verification of input parameters, the attacker can input carefully constructed commands to make the ABE service execute some commands with root privilege.
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Analysis
by VulDB Data Team • 02/17/2025
The vulnerability identified as CVE-2020-12487 represents a critical privilege escalation flaw within the ABE service architecture that stems from inadequate input parameter validation mechanisms. This weakness allows malicious actors to craft specially designed command sequences that bypass normal security controls and execute arbitrary code with elevated root privileges. The vulnerability specifically targets the service's inability to properly sanitize and verify user-supplied inputs, creating a pathway for unauthorized command execution that can compromise the entire system infrastructure. The flaw exists at the core of the service's authentication and authorization framework, where input validation routines fail to adequately filter or escape potentially dangerous command constructs. This vulnerability is particularly concerning as it directly undermines the principle of least privilege and can lead to complete system compromise when exploited.
The technical implementation of this vulnerability aligns with CWE-77 and CWE-78 categories, which specifically address command injection flaws and improper input validation respectively. The attack vector typically involves sending malformed or specially crafted parameters through the ABE service interface that are then processed without proper sanitization. When the service executes these commands, it does so with the privileges of the root user, allowing attackers to perform system-level operations including but not limited to privilege escalation, data exfiltration, system modification, and persistent access establishment. The vulnerability demonstrates characteristics consistent with the attack pattern described in the MITRE ATT&CK framework under T1068 for escalation of privileges and T1059 for command and scripting interpreter execution. The root cause lies in the service's reliance on unsafe command execution methods that directly incorporate user input into system commands without adequate validation or escaping mechanisms.
The operational impact of CVE-2020-12487 extends far beyond simple privilege escalation, as it can enable attackers to establish persistent backdoors, exfiltrate sensitive data, and compromise the integrity of the entire system environment. Organizations relying on affected ABE services face significant risk of data breaches, system compromise, and potential regulatory violations. The vulnerability can be exploited by attackers with minimal technical expertise, making it particularly dangerous in environments where security controls are insufficient or misconfigured. Once exploited, the attacker gains complete control over the system, potentially allowing for lateral movement within the network, credential harvesting, and further exploitation of other vulnerable systems. The impact is compounded by the fact that such vulnerabilities often remain undetected for extended periods, providing attackers with prolonged access to target environments.
Mitigation strategies for CVE-2020-12487 should focus on implementing robust input validation and sanitization mechanisms throughout the service architecture. Organizations must enforce proper parameter validation that rejects or escapes potentially dangerous characters and sequences before any command execution occurs. The implementation of secure coding practices including input sanitization, output encoding, and privilege separation can effectively prevent exploitation of this vulnerability. System administrators should apply vendor-provided patches and updates immediately upon release, while also implementing network segmentation and monitoring controls to detect suspicious command execution patterns. Additional protective measures include implementing mandatory access controls, regular security audits, and privilege revocation for services that do not require root-level execution. The remediation process should also involve comprehensive security testing including penetration testing and code review to identify similar vulnerabilities within the system architecture. Organizations should also establish incident response procedures specifically designed to address privilege escalation attacks and ensure proper logging and monitoring of system commands to detect exploitation attempts.