CVE-2022-2191

Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Eclipse Jetty ausnutzen, um einen Denial of Service Angriff durchzuführen und Informationen zu manipulieren.

### Impact `SslConnection` does not release `ByteBuffer`s 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 `ByteBuffer`s used to process the TLS handshake will be leaked. ### 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 `ByteBuffer`s that will be GCed normally. _With embedded-jetty_ ``` java 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 `${jetty.base}/etc/retainable-byte-buffer-config.xml` ``` xml <?xml version="1.0"?> <!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN" "https://www.eclipse.org/jetty/configure_10_0.dtd"> <Configure id="Server" class="org.eclipse.jetty.server.Server"> <Call name="addBean"> <Arg> <New class="org.eclipse.jetty.io.ArrayRetainableByteBufferPool"> <Arg type="int"><Property name="jetty.byteBufferPool.minCapacity" default="0"/></Arg> <Arg type="int"><Property name="jetty.byteBufferPool.factor" default="-1"/></Arg> <Arg type="int"><Property name="jetty.byteBufferPool.maxCapacity" default="-1"/></Arg> <Arg type="int"><Property name="jetty.byteBufferPool.maxBucketSize" default="1000"/></Arg> <Arg type="long"><Property name="jetty.byteBufferPool.maxHeapMemory" default="128000000"/></Arg> <Arg type="long"><Property name="jetty.byteBufferPool.maxDirectMemory" default="128000000"/></Arg> </New> </Arg> </Call> </Configure> ``` And then reference it in `${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 [security@webtide.com](mailto:security@webtide.com)