CVE-2017-20189

Public Exploit

Description

In Clojure before 1.9.0, classes can be used to construct a serialized object that executes arbitrary code upon deserialization. This is relevant if a server deserializes untrusted objects.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 2.24% Top 20%
Vendor Advisory atlassian.net
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://hackmd.io/%40fe1w0/HyefvRQKp third party advisory exploit
https://clojure.atlassian.net/browse/CLJ-2204 patch vendor advisory exploit
https://github.com/frohoff/ysoserial/pull/68/files patch
https://github.com/clojure/clojure/commit/271674c9b484d798484d134a5ac40a6df15d3ac3 patch
https://security.snyk.io/vuln/SNYK-JAVA-ORGCLOJURE-5740378 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2017-20189?
CVE-2017-20189 has been scored as a critical severity vulnerability.
How to fix CVE-2017-20189?
To fix CVE-2017-20189, 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-2017-20189 being actively exploited in the wild?
It is possible that CVE-2017-20189 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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