CVE-2020-28194 : Exploit Details and Defense Strategies

A variable underflow vulnerability exists in accel-ppp radius/packet.c, allowing arbitrary code execution when a RADIUS vendor-specific attribute with a length field less than 2 is received.

Understanding CVE-2020-28194

This CVE involves a specific vulnerability in the accel-ppp software.

What is CVE-2020-28194?

The vulnerability occurs in accel-ppp radius/packet.c when a RADIUS vendor-specific attribute with a length field less than 2 is received, potentially leading to arbitrary code execution.

The Impact of CVE-2020-28194

The impact is significant when the attacker gains control of the RADIUS server, allowing them to execute arbitrary code.

Technical Details of CVE-2020-28194

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability is a variable underflow in accel-ppp radius/packet.c, triggered by a specific condition in the handling of RADIUS vendor-specific attributes.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions: Not applicable

Exploitation Mechanism

The vulnerability can be exploited by an attacker who controls the RADIUS server and sends a crafted RADIUS vendor-specific attribute with a length field less than 2.

Mitigation and Prevention

Protecting systems from CVE-2020-28194 is crucial to maintaining security.

Immediate Steps to Take

Apply patches or updates provided by the software vendor.
Monitor network traffic for any suspicious activity related to RADIUS communications.

Long-Term Security Practices

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

Patching and Updates

Ensure that the software is kept up to date with the latest patches and security fixes.