https://bz.apache.org/bugzilla/show_bug.cgi?id=66170
Bug ID: 66170
Summary: change IllegalArgumentException log output
Product: Tomcat 9
Version: 9.0.64
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P2
Component: Connectors
Assignee: dev@tomcat.apache.org
Reporter: apa...@resellerdesktop.de
Target Milestone: -----
ATM we get this output in the logs, when a hacker tries to scan for
vulnerability:
Juli 19, 2022 11:45:22 VORM. org.apache.coyote.http11.Http11Processor service
INFORMATION: Error parsing HTTP request header
Note: further occurrences of HTTP request parsing errors will be logged at
DEBUG level.
java.lang.IllegalArgumentException: Ungültiges Zeichen im Methodennamen
[ep.zyxel80;rm+-rf+arm7%3b%23&remoteSubmit=Save0x0d0x0a0x0d0x0a...] gefunden.
HTTP Methodennamen müssen Token sein
at
org.apache.coyote.http11.Http11InputBuffer.parseRequestLine(Http11InputBuffer.java:419)
at
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:271)
at
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
at
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:890)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1787)
at
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at
org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
at
org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:829)
This is as helpfull as a rotten tomato, because:
a) Nobody cares for this stacktrace, the error message is important.
b) the offending IP is not logged, so you can't defend the server against that
attacker.
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