CVE-2020-27541 Explained : Impact and Mitigation

A Denial of Service vulnerability in Rostelecom CS-C2SHW 5.0.082.1 allows attackers to terminate the AgentGreen service by exploiting a bug in parsing broadcast discovery UDP packets.

Understanding CVE-2020-27541

This CVE involves a vulnerability in the AgentGreen service of Rostelecom CS-C2SHW 5.0.082.1, leading to a Denial of Service condition.

What is CVE-2020-27541?

The vulnerability arises from a bug in parsing broadcast discovery UDP packets, where sending a packet of insufficient size triggers an attempt to allocate a buffer of negative size, resulting in the termination and subsequent restart of the AgentGreen service.

The Impact of CVE-2020-27541

Exploitation of this vulnerability can lead to a Denial of Service, disrupting the normal operation of the AgentGreen service and potentially affecting the availability of the system.

Technical Details of CVE-2020-27541

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The vulnerability in Rostelecom CS-C2SHW 5.0.082.1 allows for a Denial of Service attack by manipulating the parsing of broadcast discovery UDP packets, causing the AgentGreen service to crash.

Affected Systems and Versions

Affected Systems: Rostelecom CS-C2SHW 5.0.082.1
Affected Versions: Not specified

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a UDP packet of insufficient size, triggering a buffer allocation error that leads to the termination and subsequent restart of the AgentGreen service.

Mitigation and Prevention

Protecting systems from CVE-2020-27541 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply vendor-supplied patches or updates to address the vulnerability promptly.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any suspicious activity that could indicate exploitation attempts.

Long-Term Security Practices

Regularly update and patch all software and firmware to prevent known vulnerabilities.
Conduct security assessments and penetration testing to identify and address weaknesses proactively.
Educate system administrators and users on best security practices to enhance overall system resilience.

Patching and Updates

Ensure timely application of patches and updates provided by Rostelecom for the affected CS-C2SHW 5.0.082.1 version.