CVE-2023-0956 Explained : Impact and Mitigation

This article provides detailed information about CVE-2023-0956, which affects TelWin SCADA WebInterface by TEL-STER.

Understanding CVE-2023-0956

CVE-2023-0956 is a vulnerability identified in TelWin SCADA WebInterface that could allow an unauthenticated attacker to read files on the system by using external input to construct paths to files and directories without neutralizing special elements within the pathname.

What is CVE-2023-0956?

The CVE-2023-0956 vulnerability in the TelWin SCADA WebInterface enables attackers to exploit external input to navigate paths to system files and directories, potentially exposing sensitive information without proper access permissions.

The Impact of CVE-2023-0956

This vulnerability has a high severity rating with a CVSS base score of 7.5 due to its potential for unauthorized file access, particularly impacting the confidentiality of sensitive data stored on the system.

Technical Details of CVE-2023-0956

The CVE-2023-0956 vulnerability is classified as a CWE-35 Path Traversal issue, which allows attackers to manipulate input to traverse directories and access files that should be restricted.

Vulnerability Description

The vulnerability in TelWin SCADA WebInterface arises from the lack of proper neutralization of special elements in file paths, enabling attackers to craft malicious inputs that lead to unauthorized file access.

Affected Systems and Versions

TelWin SCADA WebInterface versions 3.2, 7.0, and 8.0 are affected by CVE-2023-0956, with specific versions indicated as vulnerable and susceptible to exploitation.

Exploitation Mechanism

With the ability to construct paths to files and directories using external input, attackers can exploit this vulnerability to bypass security restrictions and access files on the system without proper authorization.

Mitigation and Prevention

To address CVE-2023-0956 and mitigate the risk it poses, users of TelWin SCADA WebInterface are advised to take immediate action to secure their systems and prevent unauthorized file access.

Immediate Steps to Take

TEL-STER recommends users to update the WebInterface module to the patched versions (6.2, 7.2, 8.1, 9.1, or 10.0) to mitigate the vulnerability. It is essential to regularly update the TelWin SCADA software to ensure protection against known security risks.

Long-Term Security Practices

Implementing secure coding practices, input validation mechanisms, and regular security audits can help prevent similar path traversal vulnerabilities in the future and enhance overall system security.

Patching and Updates

Users should stay informed about security advisories from TEL-STER and apply timely updates to both the WebInterface module and the TelWin SCADA software to maintain a secure and resilient system against potential threats.