CVE-2022-2191

Workarounds

Configure explicitly a RetainableByteBufferPool with max[Heap|Direct]Memory to limit the amount of memory that is leaked.
Eventually the pool will be full of "active" entries (the leaked ones) and will provide ByteBuffers that will be GCed normally.

With embedded-jetty

int maxBucketSize = 1000;
long maxHeapMemory = 128 * 1024L * 1024L; // 128 MB
long maxDirectMemory = 128 * 1024L * 1024L; // 128 MB
RetainableByteBufferPool rbbp = new ArrayRetainableByteBufferPool(0, -1, -1, maxBucketSize, maxHeapMemory, maxDirectMemory);

server.addBean(rbbp); // make sure the ArrayRetainableByteBufferPool is added before the server is started
server.start();

With jetty-home/jetty-base

Create a ${jetty.base}/etc/retainable-byte-buffer-config.xml

<?xml version="1.0"?>
<!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN" "https://www.eclipse.org/jetty/configure_10_0.dtd">

<Configure id="Server" class="org.eclipse.jetty.server.Server">
  <Call name="addBean">
    <Arg>
      <New class="org.eclipse.jetty.io.ArrayRetainableByteBufferPool">
        <Arg type="int"><Property name="jetty.byteBufferPool.minCapacity" default="0"/></Arg>
        <Arg type="int"><Property name="jetty.byteBufferPool.factor" default="-1"/></Arg>
        <Arg type="int"><Property name="jetty.byteBufferPool.maxCapacity" default="-1"/></Arg>
        <Arg type="int"><Property name="jetty.byteBufferPool.maxBucketSize" default="1000"/></Arg>
        <Arg type="long"><Property name="jetty.byteBufferPool.maxHeapMemory" default="128000000"/></Arg>
        <Arg type="long"><Property name="jetty.byteBufferPool.maxDirectMemory" default="128000000"/></Arg>
      </New>
    </Arg>
  </Call>
</Configure>

And then reference it in ${jetty.base}/start.d/retainable-byte-buffer-config.ini

etc/retainable-byte-buffer-config.xml

References

https://github.com/eclipse/jetty.project/issues/8161

For more information

• Email us at [email protected]

SslConnection does not release ByteBuffers in case of error code paths.
For example, TLS handshakes that require client-auth with clients that send expired certificates will trigger a TLS handshake errors and the ByteBuffers used to process the TLS handshake will be leaked.

CVE-2022-2191 has a CVSS score of 7.5 (High). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (11.0.10, 10.0.10); upgrading removes the vulnerable code path.

Kodem intelligence

1. What is CVE-2022-2191? CVE-2022-2191 is a high-severity security vulnerability in org.eclipse.jetty:jetty-server (maven), affecting versions >= 11.0.0, < 11.0.10. It is fixed in 11.0.10, 10.0.10.
2. How severe is CVE-2022-2191? CVE-2022-2191 has a CVSS score of 7.5 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of org.eclipse.jetty:jetty-server are affected by CVE-2022-2191? org.eclipse.jetty:jetty-server (maven) versions >= 11.0.0, < 11.0.10 is affected.
4. Is there a fix for CVE-2022-2191? Yes. CVE-2022-2191 is fixed in 11.0.10, 10.0.10. Upgrade to this version or later.
5. Is CVE-2022-2191 exploitable, and should I be worried? Whether CVE-2022-2191 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2022-2191 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2022-2191?
   • Upgrade org.eclipse.jetty:jetty-server to 11.0.10 or later
   • Upgrade org.eclipse.jetty:jetty-server to 10.0.10 or later