CVE-2021-21687

Description

Jenkins 2.318 and earlier, LTS 2.303.2 and earlier does not check agent-to-controller access to create symbolic links when unarchiving a symbolic link in FilePath#untar.

Category

9.1
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.32%
Vendor Advisory jenkins.io
Affected: Jenkins project Jenkins
Published at:
Updated at:

References

Link Tags
https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-21687?
CVE-2021-21687 has been scored as a critical severity vulnerability.
How to fix CVE-2021-21687?
To fix CVE-2021-21687, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-21687 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-21687 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-21687?
CVE-2021-21687 affects Jenkins project Jenkins.
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