#VU55284 Missing authentication for critical function in Jira Data Center and Jira Service Management Data Center - CVE-2020-36239

Vulnerability identifier: #VU55284

Vulnerability risk: Critical

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Red]

CVE-ID: CVE-2020-36239

CWE-ID: CWE-306

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Jira Data Center
Server applications / Other server solutions
Jira Service Management Data Center
Server applications / Other server solutions

Vendor: Atlassian

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to missing authentication in the Ehcache RMI network service, listening on ports 40001/TCP and 40011/TCP. A remote non-authenticated attacker with ability to connect to the affected port can send a specially crafted request and execute arbitrary code on the system.

Successful exploitation of the vulnerability allows a remote attacker to compromise the affected system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Jira Data Center: 6.3.0 - 8.16.2

Jira Service Management Data Center: 2.0.3 - 2.0.4, 2.1.0 - 2.1.2, 2.2.0 - 2.2.2, 2.3.0 - 2.3.6, 2.4.0 - 2.4.3, 2.5.0 - 2.5.9, 3.0.0 - 3.0.11, 3.1.0 - 3.16.18, 3.2.0 - 3.2.15, 3.3.0 - 3.3.1, 3.4.0 - 3.4.2, 3.5.0 - 3.5.3, 3.6.0 - 3.6.4, 3.7.0 - 3.7.2, 3.8.1 - 3.8.5, 3.9.0 - 3.9.17, 4.0.0-m0029 - 4.0.3, 4.1.0 - 4.16.2, 4.2.0 - 4.2.6, 4.3.0 - 4.3.5, 4.4.0 - 4.4.3, 4.5.0 - 4.5.15, 4.6.0 - 4.6.1, 4.7.0 - 4.7.1, 4.8.0 - 4.8.1, 4.9.0 - 4.9.1

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External links
https://confluence.atlassian.com/adminjiraserver/jira-data-center-and-jira-service-management-data-center-security-advisory-2021-07-21-1063571388.html
https://jira.atlassian.com/browse/JRASERVER-72566?src=confmacro

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.