DescriptionNetty is an open-source, asynchronous event-driven network application framework for 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 is enabled. On unix-like systems, the temporary directory is shared between all user. 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.
Overall state of this security issue: Pending
This issue is currently rated as having moderate severity.
|National Vulnerability Database|
|National Vulnerability Database||SUSE|
- SUSE-SU-2022:1271-1, published Wed Apr 20 10:27:06 UTC 2022
List of released packages
|Product(s)||Fixed package version(s)||References|
|openSUSE Leap 15.3|| ||Patchnames: |
|openSUSE Tumbleweed|| ||Patchnames: |
openSUSE Tumbleweed GA netty-4.1.60-1.4
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.
|SUSE Manager Server Module 4.0||netty||Unsupported|
|SUSE Manager Server Module 4.1||netty||Affected|
|SUSE Manager Server Module 4.2||netty||Affected|
|SUSE Manager Server Module 4.3||netty||Affected|