CVE-2020-5674 in Product
Summary
by MITRE • 11/24/2020
Untrusted search path vulnerability in the installers of multiple SEIKO EPSON products allows an attacker to gain privileges via a Trojan horse DLL in an unspecified directory.
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Analysis
by VulDB Data Team • 12/10/2020
The vulnerability identified as CVE-2020-5674 represents a critical untrusted search path issue affecting multiple SEIKO EPSON product installers. This flaw resides in the installer components of various EPSON software products, creating a pathway for privilege escalation attacks through malicious DLL injection techniques. The vulnerability stems from improper handling of dynamic link library loading sequences during the installation process, where the installer fails to validate or restrict the directories from which required libraries are loaded. This weakness allows attackers to place malicious DLL files in directories that are searched before legitimate system directories, effectively enabling code execution with elevated privileges. The unspecified directory mentioned in the description indicates that the vulnerability affects multiple potential locations within the file system where the installer might search for required components, making the attack surface broader and more difficult to predict. This type of vulnerability directly aligns with CWE-426, which describes the insecure loading of dynamic libraries, and represents a classic privilege escalation vector in software installation processes. The attack scenario typically involves an attacker placing a specially crafted malicious DLL in a directory that will be searched before legitimate system directories, causing the installer to execute the malicious code with the privileges of the user running the installation process.
The operational impact of CVE-2020-5674 extends beyond simple privilege escalation to encompass potential full system compromise, especially when the installer is executed with administrative privileges. Attackers can leverage this vulnerability to execute arbitrary code, install backdoors, modify system configurations, or establish persistent access to affected systems. The vulnerability affects not only individual user systems but also enterprise environments where EPSON software installations are common, potentially providing attackers with a foothold for lateral movement within networks. Organizations running multiple EPSON products that utilize affected installers face significant risk, as the vulnerability can be exploited through various attack vectors including phishing campaigns, supply chain compromises, or social engineering tactics targeting system administrators. The impact is particularly concerning given that many EPSON products are widely deployed in business environments for printing and imaging solutions, making them attractive targets for cybercriminals seeking to establish persistent access to corporate networks. This vulnerability also aligns with ATT&CK technique T1059.001, which covers command and scripting interpreter execution, as the malicious code execution through the installer process can lead to further exploitation activities.
Mitigation strategies for CVE-2020-5674 should focus on immediate patching of affected EPSON software installations, as vendors typically release security updates to address such vulnerabilities. Organizations must implement strict directory permissions and access controls to prevent unauthorized DLL placement in installation directories, while also conducting thorough security audits of existing installations to identify and remediate vulnerable systems. The principle of least privilege should be enforced during installation processes, ensuring that installers run with minimal required permissions rather than administrative rights whenever possible. System administrators should monitor for unusual DLL loading activities and implement application whitelisting policies to prevent execution of unauthorized dynamic link libraries. Additionally, organizations should establish robust patch management processes to ensure timely deployment of security updates for all EPSON products and related software components. Network segmentation and monitoring solutions can help detect suspicious installation activities or attempts to place malicious DLL files in targeted directories. The vulnerability also underscores the importance of secure coding practices in installer development, specifically the implementation of secure library loading mechanisms that validate the source and integrity of dynamic link libraries before execution. Regular security assessments of installation processes and dependency management should be conducted to identify and remediate similar search path vulnerabilities across the organization's software ecosystem.