Learn about CVE-2020-36238, a critical authorization vulnerability in Jira Server and Data Center versions, allowing remote attackers to verify usernames. Find mitigation steps and preventive measures here.
A vulnerability in Jira Server and Data Center versions prior to specific releases allows remote attackers to determine the validity of usernames.
Understanding CVE-2020-36238
This CVE identifies an authorization issue in Jira Server and Data Center that could be exploited by remote attackers.
What is CVE-2020-36238?
The vulnerability in the /rest/api/1.0/render resource in Jira Server and Data Center versions before 8.5.13, between 8.6.0 and 8.13.5, and between 8.14.0 and 8.15.1 enables anonymous remote attackers to verify the validity of usernames due to a missing permissions check.
The Impact of CVE-2020-36238
The vulnerability poses a risk of unauthorized user validation, potentially aiding malicious actors in reconnaissance activities.
Technical Details of CVE-2020-36238
This section delves into the specifics of the vulnerability.
Vulnerability Description
The issue arises from a lack of proper permissions validation in the /rest/api/1.0/render resource, allowing attackers to discern valid usernames.
Affected Systems and Versions
Exploitation Mechanism
Attackers can exploit this vulnerability remotely to check the validity of usernames without proper authorization.
Mitigation and Prevention
Protecting systems from CVE-2020-36238 requires immediate actions and long-term security practices.
Immediate Steps to Take
Long-Term Security Practices
Patching and Updates