CVE-2020-2100 : What You Need to Know

Jenkins 2.218 and earlier, LTS 2.204.1 and earlier versions are vulnerable to a UDP amplification reflection denial of service attack on port 33848.

Understanding CVE-2020-2100

This CVE affects Jenkins instances running specific versions, potentially leading to denial of service attacks.

What is CVE-2020-2100?

CVE-2020-2100 is a vulnerability in Jenkins versions 2.218 and earlier, LTS 2.204.1 and earlier, allowing for a UDP amplification reflection denial of service attack on port 33848.

The Impact of CVE-2020-2100

The vulnerability could be exploited by attackers to launch denial of service attacks, potentially disrupting Jenkins services and affecting system availability.

Technical Details of CVE-2020-2100

Jenkins 2.218 and earlier, LTS 2.204.1 and earlier are susceptible to this vulnerability.

Vulnerability Description

The vulnerability allows for a UDP amplification reflection denial of service attack on port 33848.

Affected Systems and Versions

Jenkins versions <= 2.218
LTS versions <= 2.204.1

Exploitation Mechanism

Attackers can exploit this vulnerability to launch UDP amplification reflection denial of service attacks on port 33848.

Mitigation and Prevention

Taking immediate steps and implementing long-term security practices are crucial to mitigate the risks associated with CVE-2020-2100.

Immediate Steps to Take

Update Jenkins to a non-vulnerable version.
Implement network-level protections to mitigate UDP amplification attacks.

Long-Term Security Practices

Regularly update Jenkins and apply security patches promptly.
Monitor network traffic for suspicious activities and implement access controls.
Conduct security assessments and penetration testing to identify and address vulnerabilities.

Patching and Updates

Apply the latest security patches provided by Jenkins to address the CVE-2020-2100 vulnerability.