CVE-2020-14340 Uncontrolled Resource Consumption in XNIO

What is CVE-2020-14340?

CVE-2020-14340 is a medium-severity denial of service vulnerability in Oracle Communications Cloud Native Core Policy, published on 2 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability was discovered in XNIO where file descriptor leak caused by growing amounts of NIO Selector file handles between garbage collection cycles. It may allow the attacker to cause a denial of service. It affects XNIO versions 3.6.0.Beta1 through 3.8.1.Final.

Weakness: CWE-400

Which versions are affected by CVE-2020-14340?

4 open source packages ship an affected version, including org.jboss.xnio:xnio-nio. It affects 14 products.

Products include Oracle Communications Cloud Native Core Console, Oracle Communications Cloud Native Core Network Repository Function, Oracle Communications Cloud Native Core Policy, Oracle Communications Cloud Native Core Security Edge Protection Proxy, Oracle Communications Cloud Native Core Service Communication Proxy, Oracle Communications Cloud Native Core Unified Data Repository and 8 more.

How do I fix CVE-2020-14340?

Upgrade org.jboss.xnio:xnio-nio to a fixed version for your release line: 3.7.9.Final or 3.8.2.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-2020-14340 being exploited?

There is no known exploitation of CVE-2020-14340 in the wild and no public exploit code.

Other vulnerabilities in Oracle Communications Cloud Native Core Policy

• CVE-2021-2471 Incorrect Authorization in MySQL Connector Java Medium 5.9
• CVE-2021-22060 Log entry injection in Spring Framework Medium 4.3

All Oracle Communications Cloud Native Core Policy vulnerabilities

Sources

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

Also known as DEBIAN-CVE-2020-14340, GHSA-c738-77x8-wmq5, UBUNTU-CVE-2020-14340.