CVE-2018-1114 Uncontrolled Resource Consumption in Undertow

What is CVE-2018-1114?

CVE-2018-1114 is a medium-severity denial of service vulnerability in Redhat Virtualization, published on 11 Sep 2018. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

It was found that URLResource.getLastModified() in Undertow closes the file descriptors only when they are finalized which can cause file descriptors to exhaust. This leads to a file handler leak.

Weakness: CWE-400

Which versions are affected by CVE-2018-1114?

4 open source packages ship an affected version, including io.undertow:undertow-core. It affects 3 products.

Products include Redhat Undertow, Redhat Virtualization, Redhat Virtualization Host.

How do I fix CVE-2018-1114?

Upgrade io.undertow:undertow-core to a fixed version for your release line: 1.4.25.Final or 2.0.5.Final.

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-2018-1114 being exploited?

There is no known exploitation of CVE-2018-1114 in the wild and no public exploit code.

Other vulnerabilities in Redhat Virtualization

• CVE-2020-1745 Improper Authorization in Undertoe High 8.6
• CVE-2017-7559 Undertow vulnerable to Request Smuggling Medium 6.1
• CVE-2024-1459 Undertow: directory traversal vulnerability Medium 5.3
• CVE-2014-7816 Improper Limitation of a Pathname to a Restricted Directory in JBoss Undertow Medium 5.0

All Redhat Virtualization vulnerabilities

Sources

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

Also known as DEBIAN-CVE-2018-1114, GHSA-gjjx-gqm4-wcgm, UBUNTU-CVE-2018-1114.