CVE-2019-8981 Explained : Impact and Mitigation

A Buffer Overflow vulnerability exists in the tls1.c code of Cameron Hamilton-Rich axTLS versions prior to 2.1.5, allowing for mismanagement of the need_bytes value.

Understanding CVE-2019-8981

This CVE involves a specific vulnerability in the axTLS library that can be exploited through crafted TLS packets, potentially leading to a Buffer Overflow.

What is CVE-2019-8981?

The vulnerability in the tls1.c code of axTLS versions before 2.1.5 allows attackers to manipulate TLS packets, causing a Buffer Overflow due to mishandling of the need_bytes value.

The Impact of CVE-2019-8981

This vulnerability could be exploited by malicious actors to execute arbitrary code, crash the application, or potentially gain unauthorized access to sensitive information.

Technical Details of CVE-2019-8981

The technical aspects of this CVE provide insight into the specific nature of the vulnerability and its implications.

Vulnerability Description

The Buffer Overflow vulnerability in tls1.c of axTLS versions prior to 2.1.5 arises from the mishandling of the need_bytes value when processing crafted TLS packets.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: All versions of axTLS prior to 2.1.5

Exploitation Mechanism

Attackers can exploit this vulnerability by sending specially crafted TLS packets to the target system, causing a Buffer Overflow due to the mismanagement of the need_bytes value.

Mitigation and Prevention

Protecting systems from CVE-2019-8981 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update axTLS to version 2.1.5 or later to mitigate the vulnerability.
Monitor network traffic for any signs of malicious activity targeting this vulnerability.

Long-Term Security Practices

Regularly update software and libraries to patch known vulnerabilities.
Implement network segmentation to limit the impact of potential attacks.

Patching and Updates

Apply patches and updates provided by the axTLS project to address the Buffer Overflow vulnerability.