CVE-2020-13768 : Security Advisory and Response

MiniShare before version 1.4.2 is vulnerable to a stack-based buffer overflow via an HTTP PUT request, enabling attackers to execute arbitrary code. This CVE is similar to CVE-2018-19861, CVE-2018-19862, and CVE-2019-17601.

Understanding CVE-2020-13768

In MiniShare before 1.4.2, a stack-based buffer overflow vulnerability exists, potentially leading to arbitrary code execution.

What is CVE-2020-13768?

CVE-2020-13768 is a security vulnerability in MiniShare before version 1.4.2 that allows attackers to trigger a stack-based buffer overflow through an HTTP PUT request, resulting in the execution of arbitrary code.

The Impact of CVE-2020-13768

Successful exploitation can lead to arbitrary code execution on the affected system.
This vulnerability is considered critical due to the potential for unauthorized code execution.
MiniShare being discontinued may hinder official patches or updates to address this issue.

Technical Details of CVE-2020-13768

MiniShare before version 1.4.2 is susceptible to a stack-based buffer overflow vulnerability, allowing attackers to execute arbitrary code.

Vulnerability Description

The vulnerability arises from improper handling of HTTP PUT requests, leading to a stack-based buffer overflow.

Affected Systems and Versions

Product: MiniShare
Vendor: N/A
Versions affected: All versions before 1.4.2

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a specifically crafted HTTP PUT request to the target system, triggering the buffer overflow and potentially executing malicious code.

Mitigation and Prevention

Taking immediate steps and implementing long-term security practices are crucial to mitigating the risks associated with CVE-2020-13768.

Immediate Steps to Take

Disable or restrict access to the MiniShare service if not essential.
Implement network-level protections to filter out potentially malicious HTTP requests.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

Regularly update and patch software to the latest versions to address known vulnerabilities.
Conduct security assessments and penetration testing to identify and remediate weaknesses.

Patching and Updates

As MiniShare is discontinued, consider migrating to a supported and actively maintained alternative to ensure ongoing security updates and support.