CVE-2020-5825 in Endpoint Protection
Summary
by MITRE
Symantec Endpoint Protection (SEP) and Symantec Endpoint Protection Small Business Edition (SEP SBE), prior to 14.2 RU2 MP1 and prior to 14.2.5569.2100 respectively, may be susceptible to an arbitrary file write vulnerability, which is a type of issue whereby an attacker is able to overwrite existing files on the resident system without proper privileges.
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Analysis
by VulDB Data Team • 02/12/2020
The vulnerability identified as CVE-2020-5825 affects Symantec Endpoint Protection and Symantec Endpoint Protection Small Business Edition products, representing a critical arbitrary file write flaw that undermines the security posture of endpoint protection systems. This issue manifests in versions prior to 14.2 RU2 MP1 for standard SEP and 14.2.5569.2100 for SEP SBE, creating a persistent threat vector that allows unauthorized file modification on affected systems. The vulnerability stems from insufficient validation mechanisms within the software's file handling processes, enabling attackers to manipulate the file system without proper authentication or authorization. This arbitrary file write capability directly violates fundamental security principles and creates opportunities for privilege escalation, malware deployment, and system compromise.
The technical exploitation of this vulnerability involves leveraging the flawed file handling mechanisms to place malicious files in critical system directories or overwrite existing legitimate files with malicious counterparts. Attackers can potentially target system configuration files, executable binaries, or security-related components to establish persistence or gain elevated privileges. The flaw operates at the file system level, making it particularly dangerous as it bypasses traditional authentication mechanisms and can be exploited through various attack vectors including malicious email attachments, compromised websites, or social engineering campaigns. This arbitrary write capability aligns with CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal attacks, and represents a significant deviation from secure coding practices that should enforce proper file access controls and validation.
The operational impact of CVE-2020-5825 extends beyond immediate system compromise to create long-term security degradation within affected organizations. Once exploited, attackers can modify security policies, disable protection mechanisms, or install backdoors that persist across system reboots. The vulnerability affects endpoint protection solutions that are typically deployed as security gateways, making them prime targets for attackers seeking to undermine enterprise security infrastructure. Organizations using these vulnerable versions face increased risk of data breaches, lateral movement within networks, and complete system compromise. The flaw particularly impacts environments where SEP is used for critical security functions, as it directly undermines the trust model that security products are designed to maintain. This vulnerability can be leveraged in conjunction with other attack techniques to create multi-stage compromises that align with ATT&CK tactics such as privilege escalation and persistence.
Mitigation strategies for CVE-2020-5825 require immediate patching of affected systems to the latest versions that address the arbitrary file write vulnerability. Organizations should implement network segmentation and access controls to limit exposure of vulnerable systems, while also conducting thorough security assessments to identify any potential exploitation that may have occurred. The remediation process should include verifying that all endpoint protection clients are updated to versions that contain the security fixes, and monitoring for unusual file system activity that might indicate exploitation attempts. Security teams should also consider implementing additional layers of protection such as application whitelisting, file integrity monitoring, and enhanced logging to detect and respond to potential exploitation attempts. Regular security assessments and vulnerability scanning should be performed to ensure that all endpoint protection systems remain up-to-date and protected against similar vulnerabilities that may arise in the future.