Akshay Kotecha Jain created KNOX-2590:
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Summary: Upgrade netty-handler to netty-codec-http:4.1.59.Final
Key: KNOX-2590
URL: https://issues.apache.org/jira/browse/KNOX-2590
Project: Apache Knox
Issue Type: Improvement
Reporter: Akshay Kotecha Jain
Netty is an open-source, asynchronous event-driven network application
framework for the rapid development of maintainable high-performance protocol
servers & clients. In Netty before version 4.1.59.Final there is a
vulnerability on Unix-like systems involving an insecure temp file. When
netty's multipart decoders are used local information disclosure can occur via
the local system temporary directory if temporary storing uploads on the disk
are enabled. On Unix-like systems, the temporary directory is shared between
all users. As such, writing to this directory using APIs that do not explicitly
set the file/directory permissions can lead to information disclosure. Of note,
this does not impact modern MacOS Operating Systems. The method
"File.createTempFile" on Unix-like systems creates a random file, but, by
default will create this file with the permissions "-rw-r--r--". Thus, if
sensitive information is written to this file, other local users can read this
information. This is the case in netty's "AbstractDiskHttpData" is vulnerable.
This has been fixed in version 4.1.59.Final. As a workaround, one may specify
your own "java.io.tmpdir" when you start the JVM or use
"DefaultHttpDataFactory.setBaseDir(...)" to set the directory to something that
is only readable by the current user.
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