CVE-2019-20408 : Security Advisory and Response

Jira Server before version 8.7.0 is susceptible to a Server Side Request Forgery (SSRF) vulnerability due to a logic bug in the JiraWhitelist class.

Understanding CVE-2019-20408

What is CVE-2019-20408?

The vulnerability in Jira Server allows remote attackers to exploit a logic bug, leading to an SSRF vulnerability that enables access to internal network resources.

The Impact of CVE-2019-20408

The SSRF vulnerability in Jira Server could be exploited by malicious actors to access sensitive content from internal network resources.

Technical Details of CVE-2019-20408

Vulnerability Description

The JiraWhitelist class in Jira Server versions prior to 8.7.0 contains a logic bug that can be abused to perform SSRF attacks via the /plugins/servlet/gadgets/makeRequest resource.

Affected Systems and Versions

Product: Jira Server
Vendor: Atlassian
Versions Affected: < 8.7.0 (unspecified version type)

Exploitation Mechanism

The vulnerability allows attackers to access internal network resources by manipulating the /plugins/servlet/gadgets/makeRequest resource.

Mitigation and Prevention

Immediate Steps to Take

Upgrade Jira Server to version 8.7.0 or newer to mitigate the SSRF vulnerability.
Monitor network traffic for any suspicious activity that could indicate exploitation attempts.

Long-Term Security Practices

Regularly update and patch software to prevent known vulnerabilities.
Implement network segmentation to restrict access to critical resources.

Patching and Updates

Apply security patches provided by Atlassian promptly to address the SSRF vulnerability in Jira Server.