CVE-2021-21621 Support bundles can include user session IDs in Jenkins Support Core Plugin
The Jenkins Support Core Plugin may leak session IDs in support bundles, potentially allowing attackers to hijack user accounts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-21621?
CVE-2021-21621 is a medium-severity vulnerability in Jenkins Support Core Plugin, published on 24 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Jenkins Support Core Plugin 2.72 and earlier provides the serialized user authentication as part of the "About user (basic authentication details only)" information, which can include the session ID of the user creating the support bundle in some configurations.
Weakness: CWE-200
Which versions are affected by CVE-2021-21621?
2 open source packages ship an affected version, including org.jenkins-ci.plugins:support-core. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.jenkins-ci.plugins:support-core Maven | All versions | 2.72.1 |
org.jenkins-ci.plugins:support-core Maven | All versions | 2.72.1 |
Products include Jenkins Support Core.
How do I fix CVE-2021-21621?
Upgrade org.jenkins-ci.plugins:support-core to 2.72.1 or later.
Is CVE-2021-21621 being exploited?
There is no known exploitation of CVE-2021-21621 in the wild and no public exploit code.
Other vulnerabilities in Jenkins Support Core Plugin
- CVE-2022-45383 Incorrect permission checks in Jenkins Support Core Plugin
- CVE-2022-25187 Jenkins Support Core Plugin stores sensitive data in plain text
- CVE-2019-16539 Missing permission check in Jenkins Support Core Plugin
- CVE-2019-16540 Jenkins Support Core Plugin allowed users with Overall/Read permission to delete arbitrary files
Sources
Also known as GHSA-92pg-8g57-hqpx.