https://bz.apache.org/bugzilla/show_bug.cgi?id=62981
Bug ID: 62981
Summary: NPE+DoS Deadlock in CharChunk.java:256
Product: Tomcat 8
Version: 8.5.30
Hardware: PC
Status: NEW
Severity: major
Priority: P2
Component: Util
Assignee: dev@tomcat.apache.org
Reporter: p.ra...@gmx.net
Target Milestone: ----
Received this message in the logs:
05-Dec-2018 17:28:37.075 FINE [ajp-nio-8009-exec-8]
com.sotacms.server.cms.extra.seo.DefaultSEOTranslationContributor.fastMayBot
Agent requests language: null
05-Dec-2018 17:56:54.121 SEVERE [https-jsse-nio-443-exec-10]
org.apache.coyote.http11.Http11Processor.service Error processing request
java.lang.NullPointerException
at org.apache.tomcat.util.buf.CharChunk.append(CharChunk.java:256)
at org.apache.catalina.mapper.Mapper.map(Mapper.java:694)
at
org.apache.catalina.connector.CoyoteAdapter.postParseRequest(CoyoteAdapter.java:679)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:336)
at
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)
at
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459)
at
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
05-Dec-2018 19:08:05.648 FINER [https-jsse-nio-443-exec-2]
com.sotacms.server.cms.extra.seo.DefaultSEOTranslationContributor.fastMayBot
Agent is Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML,
like Gecko) Chrome/70.0.3538.110 Safari/537.36
Resulting in a deadlock causing a DoS. Service must be restarted. Seems to be
not an DoS attack.
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