CVE-2020-2091 Missing permission checks in Jenkins Amazon EC2 Plugin

High 8.1 Published 15 Jan 2020 Updated 4 Aug 2024

Attackers with read permissions can connect to arbitrary AWS URLs using stolen credentials due to missing permission checks in the Jenkins EC2 plugin.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2020-2091?

CVE-2020-2091 is a high-severity missing authorization vulnerability in Jenkins Amazon EC2 Plugin, published on 15 Jan 2020. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A missing permission check in Jenkins Amazon EC2 Plugin 1.47 and earlier allows attackers with Overall/Read permission to connect to an attacker-specified URL within the AWS region using attacker-specified credentials IDs obtained through another method.

Weakness: CWE-862

Which versions are affected by CVE-2020-2091?

2 open source packages ship an affected version, including org.jenkins-ci.plugins:ec2. It affects 1 product.

Package	Affected	Fixed in
`org.jenkins-ci.plugins:ec2` Maven	All versions	`1.48`
`org.jenkins-ci.plugins:ec2` Maven	All versions	`1.48`

Products include Jenkins Amazon Ec2.

How do I fix CVE-2020-2091?

Upgrade org.jenkins-ci.plugins:ec2 to 1.48 or later.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2020-2091 being exploited?

There is no known exploitation of CVE-2020-2091 in the wild and no public exploit code.

Sources

Also known as GHSA-6hmm-77r2-h6hr.