CVE-2020-7281 in Total Protection
Summary
by MITRE
Privilege Escalation vulnerability in McAfee Total Protection (MTP) prior to 16.0.R26 allows local users to delete files the user would otherwise not have access to via manipulating symbolic links to redirect a McAfee delete action to an unintended file. This is achieved through running a malicious script or program on the target machine.
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Analysis
by VulDB Data Team • 10/28/2020
The CVE-2020-7281 vulnerability represents a critical privilege escalation flaw within McAfee Total Protection software versions prior to 16.0.R26. This vulnerability specifically targets the file deletion functionality of the security suite, creating a dangerous pathway for local attackers to bypass normal access controls and manipulate system files. The flaw stems from insufficient validation of symbolic link operations during file deletion processes, allowing malicious actors to exploit the system's trust in legitimate file operations.
The technical implementation of this vulnerability occurs through a carefully crafted manipulation of symbolic links that redirects the deletion process to unintended targets. When McAfee Total Protection processes a file deletion request, it fails to properly resolve symbolic links before executing the deletion operation. This allows a local user to create a symbolic link that points to a protected file or system resource, and then trigger the deletion process through the McAfee interface or automated scripts. The vulnerability is particularly dangerous because it leverages legitimate system functionality while exploiting a design flaw in the file access validation mechanism. This type of vulnerability maps directly to CWE-59, which describes improper handling of symbolic links, and falls under the broader category of CWE-269, concerning privileges and access control issues.
The operational impact of CVE-2020-7281 extends beyond simple file deletion capabilities, as it enables attackers to potentially compromise system integrity and availability. Local users who can execute malicious scripts or programs on the target machine gain the ability to remove critical system files, configuration data, or user information that would normally be protected by standard access controls. This vulnerability can be exploited by attackers who have already gained a foothold on a system through other means, such as phishing attacks or unpatched software vulnerabilities, to escalate their privileges and maintain persistence. The attack vector requires minimal sophistication and can be automated through simple scripts, making it particularly dangerous in enterprise environments where McAfee Total Protection is widely deployed. The vulnerability aligns with ATT&CK technique T1068, which covers 'Exploitation for Privilege Escalation', and T1070, covering 'Indicator Removal on Host', as attackers could use this vulnerability to remove forensic evidence or system integrity checks.
Organizations affected by this vulnerability should prioritize immediate patching of all McAfee Total Protection installations to version 16.0.R26 or later, as this represents the official fix for the symbolic link handling issue. System administrators should conduct comprehensive audits of their McAfee deployments to identify all affected systems and ensure proper patch management procedures are in place. Additionally, security teams should implement monitoring for suspicious deletion activities, particularly around system directories and critical files, as this vulnerability could be used to remove security tools or create backdoors. Network segmentation and principle of least privilege should be enforced to limit the potential impact of any successful exploitation attempts, while regular security assessments should verify that no other similar symbolic link handling vulnerabilities exist in the environment. The vulnerability demonstrates the critical importance of proper input validation and access control implementation in security software, as even trusted applications can become attack vectors when proper validation mechanisms are missing.