CVE-2021-38136 Explained : Impact and Mitigation

Corero SecureWatch Managed Services 9.7.2.0020 is affected by a Path Traversal vulnerability via the snap_file parameter in the /it-IT/splunkd/__raw/services/get_snapshot HTTP API endpoint. An attacker with low privileges can read any file on the target host.

Understanding CVE-2021-38136

This CVE involves a Path Traversal vulnerability in Corero SecureWatch Managed Services, potentially allowing unauthorized access to sensitive files.

What is CVE-2021-38136?

The CVE-2021-38136 vulnerability in Corero SecureWatch Managed Services allows a 'low privileged' attacker to exploit a Path Traversal weakness through a specific API endpoint, enabling unauthorized file reading on the target system.

The Impact of CVE-2021-38136

This vulnerability poses a significant threat as it allows attackers to access sensitive files on the host system, potentially leading to unauthorized disclosure of critical information.

Technical Details of CVE-2021-38136

In this section, we delve into the specific technical aspects of the CVE, outlining the vulnerability description, affected systems, versions, and the exploitation mechanism.

Vulnerability Description

The Path Traversal vulnerability in Corero SecureWatch Managed Services arises from improper handling of user input, specifically the snap_file parameter, in the specified API endpoint.

Affected Systems and Versions

Corero SecureWatch Managed Services version 9.7.2.0020 is confirmed to be affected by CVE-2021-38136 due to the identified Path Traversal flaw.

Exploitation Mechanism

By manipulating the snap_file parameter in the /it-IT/splunkd/__raw/services/get_snapshot HTTP API endpoint, a 'low privileged' attacker can traverse directories and read sensitive files on the target host.

Mitigation and Prevention

To address CVE-2021-38136 effectively, immediate actions should be taken to mitigate the risk and prevent potential exploitation.

Immediate Steps to Take

It is recommended to apply security patches provided by Corero promptly to fix the Path Traversal vulnerability in SecureWatch Managed Services. Additionally, review and restrict access permissions to sensitive files and directories.

Long-Term Security Practices

Implement secure coding practices, input validation mechanisms, and regular security assessments to identify and address vulnerabilities proactively.

Patching and Updates

Regularly update and patch Corero SecureWatch Managed Services to ensure that known vulnerabilities, including CVE-2021-38136, are remediated effectively.