CVE-2023-4593 : Security Advisory and Response

This CVE-2023-4593 was published by INCIBE on November 23, 2023. It involves a path traversal vulnerability in BVRP Software's SLmail, specifically affecting version 5.5.0.4433. The vulnerability was discovered by Rafael Pedrero and carries a CVSS v3.1 base score of 6.5, indicating a medium severity level.

Understanding CVE-2023-4593

The CVE-2023-4593 pertains to a path traversal vulnerability in BVRP Software's SLmail software, which could potentially allow an authenticated remote user to circumvent SecurityManager's intended restrictions and access a parent directory by manipulating the 'dodoc' parameter in the /MailAdmin_dll.htm file. This type of vulnerability falls under the CAPEC-126 category of Path Traversal exploits.

What is CVE-2023-4593?

CVE-2023-4593 is a path traversal vulnerability in BVRP Software SLmail, allowing a remote user to surpass security restrictions and access directories they should not have permission to view.

The Impact of CVE-2023-4593

Exploitation of this vulnerability could lead to a high impact on confidentiality as it enables an attacker to view sensitive information within directories, although the integrity and availability of the system are not directly impacted.

Technical Details of CVE-2023-4593

The issue stems from improper limitation of a pathname to a restricted directory (Path Traversal), identified by CWE-22.

Vulnerability Description

The vulnerability allows an authenticated remote user to navigate beyond intended directory restrictions by manipulating the 'dodoc' parameter in the /MailAdmin_dll.htm file.

Affected Systems and Versions

BVRP Software's SLmail version 5.5.0.4433 is affected by this path traversal vulnerability.

Exploitation Mechanism

By injecting malicious inputs such as '..%2F' values into the 'dodoc' parameter, a remote attacker could bypass security controls and list parent directories.

Mitigation and Prevention

Addressing CVE-2023-4593 requires immediate attention to prevent unauthorized directory access and protect sensitive information.

Immediate Steps to Take

Monitor and restrict user access to the vulnerable 'dodoc' parameter.
Implement proper input validation mechanisms to prevent malicious path traversal attempts.
Regularly monitor system logs for any suspicious activity related to directory traversal.

Long-Term Security Practices

Conduct regular security assessments and penetration testing to identify and remediate vulnerabilities proactively.
Keep software and systems up to date with the latest security patches.
Educate users on safe browsing habits and awareness regarding path traversal vulnerabilities.

Patching and Updates

At the time of publication, there is no reported solution available for CVE-2023-4593. Stay informed by regularly checking for updates from BVRP Software or relevant security sources for patches or mitigation strategies.