Security News > 2021 > July > Atlassian asks customers to patch critical Jira vulnerability
Atlassian is prompting its enterprise customers to patch a critical vulnerability in many versions of its Jira Data Center and Jira Service Management Data Center products.
The vulnerability tracked as CVE-2020-36239 can give remote attackers arbitrary code execution abilities, due to a missing authentication flaw in Jira's implementation of Ehcache, an open-source component.
Yesterday, Atlassian disclosed a critical vulnerability in its Jira Data Center products.
The vulnerability tracked as CVE-2020-36239 enables remote unauthenticated attackers to execute arbitrary code in some Jira Data Center products.
Ehcache RMI ports 40001 and 40011 should be shielded using firewalls or similar technologies so that only cluster instances of Jira Data Center, Jira Core Data Center, and Jira Software Data Center, and Jira Service Management Data Center can access these.
"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," states Atlassian in a security advisory.
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Related Vulnerability
| DATE | CVE | VULNERABILITY TITLE | RISK |
|---|---|---|---|
| 2021-07-29 | CVE-2020-36239 | Missing Authentication for Critical Function vulnerability in Atlassian Jira Data Center 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. | 9.8 |