CVE-2019-20418 Denial of service in Jira Server

What is CVE-2019-20418?

CVE-2019-20418 is a medium-severity denial of service vulnerability in Atlassian Jira, published on 3 Jul 2020. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Affected versions of Atlassian Jira Server and Data Center allow remote attackers to prevent users from accessing the instance via an Application Denial of Service vulnerability in the /rendering/wiki endpoint. The affected versions are before version 8.8.0.

Which versions are affected by CVE-2019-20418?

It affects 2 products.

Products include Atlassian Jira, Atlassian Jira Software Data Center.

How do I fix CVE-2019-20418?

No fix has been published for CVE-2019-20418 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2019-20418 being exploited?

There is no known exploitation of CVE-2019-20418 in the wild and no public exploit code.

Other vulnerabilities in Atlassian Jira

• CVE-2020-14172 Deserialization in Jira Server Critical 9.8
• CVE-2019-20409 Code injection in Jira Server Critical 9.8
• CVE-2017-5983 Deserialization in n/a Critical 9.8
• CVE-2010-1165 Code injection in n/a Critical 9.0
• CVE-2016-4319 Cross-site request forgery in Atlassian JIRA Server before 7.1.9 High 8.8

All Atlassian Jira vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-g464-48x7-5h2h.