2020-36239 | Atlassian Jira Data Center Ehcache RMI deserialization
|CVSS Meta Temp Score||Current Exploit Price (≈)||CTI Interest Score|
A vulnerability classified as critical was found in Atlassian Jira Data Center, Jira Core Data Center, Jira Software Data Center and Jira Service Management Data Center (Bug Tracking Software) (the affected version is unknown). This vulnerability affects an unknown function of the component Ehcache RMI. The manipulation with an unknown input leads to a privilege escalation vulnerability. The CWE definition for the vulnerability is CWE-502. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:
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, 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.  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.  In Jira Service Management Data Center versions prior to 3.16.1, the Ehcache object port can be randomly allocated.
The weakness was shared 07/27/2021. The advisory is shared for download at confluence.atlassian.com. This vulnerability was named CVE-2020-36239 since 01/27/2021. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.
Upgrading eliminates this vulnerability. The upgrade is hosted for download at confluence.atlassian.com.
VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0
Status: Not defined
0-Day Time: 🔒
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