CVE-2020-36239

Description

Jira Data Center, Jira Core Data Center, Jira Software Data Center from version 6.3.0 before 8.5.16, from 8.6.0 before 8.13.8, from 8.14.0 before 8.17.0 and Jira Service Management Data Center from version 2.0.2 before 4.5.16, from version 4.6.0 before 4.13.8, and from version 4.14.0 before 4.17.0 exposed a Ehcache RMI network service which attackers, who can connect to the service, on port 40001 and potentially 40011[0][1], could execute arbitrary code of their choice in Jira through deserialization due to a missing authentication vulnerability. While Atlassian strongly suggests restricting access to the Ehcache ports to only Data Center instances, fixed versions of Jira will now require a shared secret in order to allow access to the Ehcache service. [0] In Jira Data Center, Jira Core Data Center, and Jira Software Data Center versions prior to 7.13.1, the Ehcache object port can be randomly allocated. [1] In Jira Service Management Data Center versions prior to 3.16.1, the Ehcache object port can be randomly allocated.

Categories

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 22.07% Top 5%
Vendor Advisory atlassian.com Vendor Advisory atlassian.com Vendor Advisory atlassian.com
Affected: Atlassian Jira Data Center
Affected: Atlassian Jira Core Data Center
Affected: Atlassian Jira Software Data Center
Affected: Atlassian Jira Service Management Data Center
Published at:
Updated at:

References

Link Tags
https://jira.atlassian.com/browse/JSDSERVER-8454 issue tracking vendor advisory
https://jira.atlassian.com/browse/JRASERVER-72566 issue tracking vendor advisory
https://confluence.atlassian.com/adminjiraserver/jira-data-center-and-jira-service-management-data-center-security-advisory-2021-07-21-1063571388.html patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-36239?
CVE-2020-36239 has been scored as a critical severity vulnerability.
How to fix CVE-2020-36239?
To fix CVE-2020-36239, 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-2020-36239 being actively exploited in the wild?
It is possible that CVE-2020-36239 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~22% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-36239?
CVE-2020-36239 affects Atlassian Jira Data Center, Atlassian Jira Core Data Center, Atlassian Jira Software Data Center, Atlassian Jira Service Management Data Center.
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