atlassian core-data-center CVE-2020-36239 vulnerability in Atlassian Products
Published on July 29, 2021

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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.

NVD

Vulnerability Analysis

CVE-2020-36239 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH

Weakness Type

What is an AuthZ Vulnerability?

The software does not perform an authorization check when an actor attempts to access a resource or perform an action.

CVE-2020-36239 has been classified to as an AuthZ vulnerability or weakness.


Products Associated with CVE-2020-36239

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Atlassian Core Data Center
 
Atlassian Data Center
 
Atlassian Service Management Data Center
 
Atlassian Software Data Center
 
Atlassian Jira
 
Atlassian Jira Service Desk
 

Affected Versions

Atlassian Jira Data Center: Atlassian Jira Core Data Center: Atlassian Jira Software Data Center: Atlassian Jira Service Management Data Center: atlassian jira_data_center: atlassian jira_service_desk: atlassian jira_service_management:

Exploit Probability

EPSS
16.17%
Percentile
94.66%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.