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CVE-2020-27216

7.0 · HIGH

In Eclipse Jetty versions 1.0 thru 9.4.32.v20200930, 10.0.0.alpha1 thru 10.0.0.beta2, and 11.0.0.alpha1 thru 11.0.0.beta2O, on Unix like systems, the system's temporary directory is shared between…

Published Oct 23, 2020CWE-378EPSS 4.35%

Overview

CVE-2020-27216 is a high-severity vulnerability. It was published on October 23, 2020 and has a CVSS 3.1 base score of 7.0 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.0, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In Eclipse Jetty versions 1.0 thru 9.4.32.v20200930, 10.0.0.alpha1 thru 10.0.0.beta2, and 11.0.0.alpha1 thru 11.0.0.beta2O, on Unix like systems, the system's temporary directory is shared between all users on that system. A collocated user can observe the process of creating a temporary sub directory in the shared temporary directory and race to complete the creation of the temporary subdirectory. If the attacker wins the race then they will have read and write permission to the subdirectory used to unpack web applications, including their WEB-INF/lib jar files and JSP files. If any code is ever executed out of this temporary directory, this can lead to a local privilege escalation vulnerability.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refbugs.eclipse.org/bugs/show_bug.cgi?id=567921GitHubgithub.com/eclipse/jetty.project/security/advisories/GHSA-g3wg-6mcf-8jj6#advisory-comment-63053Reflists.apache.org/thread.html/r0259b14ae69b87821e27fed1f5333ea86018294fd31aab16b1fac84e%40%3Cissues.beam.apache.org%3EReflists.apache.org/thread.html/r07525dc424ed69b3919618599e762f9ac03791490ca9d724f2241442%40%3Cdev.felix.apache.org%3EReflists.apache.org/thread.html/r09b345099b4f88d2bed7f195a96145849243fb4e53661aa3bcf4c176%40%3Cissues.zookeeper.apache.org%3EReflists.apache.org/thread.html/r0d7ad4f02c44d5d53a9ffcbca7ff4a8138241322da9c5c35b5429630%40%3Cissues.beam.apache.org%3EReflists.apache.org/thread.html/r0d95e01f52667f44835c40f6dea72bb4397f33cd70a564ea74f3836d%40%3Cissues.beam.apache.org%3EReflists.apache.org/thread.html/r0df8fe10fc36028cf6d0381ab66510917d0d68bc5ef7042001d03830%40%3Cdev.zookeeper.apache.org%3EReflists.apache.org/thread.html/r0e9efe032cc65433251ee6470c66c334d4e7db9101e24cf91a3961f2%40%3Ccommits.directory.apache.org%3EReflists.apache.org/thread.html/r0f5e9b93133ef3aaf31484bc3e15cc4b85f8af0fe4de2dacd9379d72%40%3Cdev.felix.apache.org%3E

How CyberStrike helps

Frequently asked questions

What is CVE-2020-27216?

CVE-2020-27216 is a high-severity vulnerability. It was published on October 23, 2020 and has a CVSS 3.1 base score of 7.0 (HIGH).

How severe is CVE-2020-27216?

This vulnerability has a CVSS 3.1 base score of 7.0, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2020-27216?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2020-27216?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-27216 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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