CVE-2017-2193 : Security Advisory and Response

This CVE-2017-2193 article provides insights into a vulnerability in the installer of Tera Term versions 4.94 and earlier, allowing attackers to exploit untrusted search paths.

Understanding CVE-2017-2193

The installer of Tera Term 4.94 and previous versions is susceptible to a security issue related to untrusted search paths, potentially leading to privilege escalation through a malicious DLL file.

What is CVE-2017-2193?

The vulnerability in the Tera Term installer version 4.94 and earlier allows attackers to gain elevated privileges by using a Trojan horse DLL file placed in an unspecified directory.

The Impact of CVE-2017-2193

The security flaw enables threat actors to execute arbitrary code with elevated privileges, posing a significant risk to affected systems.

Technical Details of CVE-2017-2193

This section delves into the technical aspects of the CVE-2017-2193 vulnerability.

Vulnerability Description

The untrusted search path vulnerability in the Tera Term installer version 4.94 and earlier permits attackers to escalate privileges by leveraging a malicious DLL file.

Affected Systems and Versions

Product: The installer of Tera Term
Vendor: TeraTerm Project
Versions Affected: 4.94 and earlier

Exploitation Mechanism

Attackers can exploit the vulnerability by placing a malicious DLL file disguised as a Trojan horse in an unspecified directory, leading to privilege escalation.

Mitigation and Prevention

Protecting systems from CVE-2017-2193 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Tera Term to a secure version that addresses the vulnerability.
Avoid downloading or executing files from untrusted sources.
Implement strict access controls to limit the impact of potential attacks.

Long-Term Security Practices

Regularly monitor and audit system activity for any signs of unauthorized access.
Educate users about the risks of downloading and executing files from unknown sources.

Patching and Updates

Apply patches and updates provided by TeraTerm Project promptly to mitigate the vulnerability and enhance system security.