Netty is an asynchronous event-driven network application framework for
rapid development of maintainable high performance protocol servers and
clients.
Path to vulnerable library: /home/wss-scanner/.gradle/caches/modules-2/files-2.1/io.netty/netty-codec-http/4.1.27.Final/a1722d6bcbbef1c4c7877e8bf38b07a3db5ed07f/netty-codec-http-4.1.27.Final.jar
Netty is an asynchronous event-driven network application framework for
rapid development of maintainable high performance protocol servers and
clients.
Path to vulnerable library: /home/wss-scanner/.gradle/caches/modules-2/files-2.1/io.netty/netty-handler/4.1.27.Final/21bd9cf565390a8d72579b8664303e3c175dfc6a/netty-handler-4.1.27.Final.jar
Netty 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.
CVE-2021-21290 - Medium Severity Vulnerability
netty-codec-http-4.1.27.Final.jar
Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers and clients.
Library home page: http://netty.io/
Path to dependency file: /build.gradle
Path to vulnerable library: /home/wss-scanner/.gradle/caches/modules-2/files-2.1/io.netty/netty-codec-http/4.1.27.Final/a1722d6bcbbef1c4c7877e8bf38b07a3db5ed07f/netty-codec-http-4.1.27.Final.jar
Dependency Hierarchy: - grpc-netty-1.14.0.jar (Root Library) - netty-codec-http2-4.1.27.Final.jar - :x: **netty-codec-http-4.1.27.Final.jar** (Vulnerable Library)
netty-handler-4.1.27.Final.jar
Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers and clients.
Library home page: http://netty.io/
Path to dependency file: /build.gradle
Path to vulnerable library: /home/wss-scanner/.gradle/caches/modules-2/files-2.1/io.netty/netty-handler/4.1.27.Final/21bd9cf565390a8d72579b8664303e3c175dfc6a/netty-handler-4.1.27.Final.jar
Dependency Hierarchy: - grpc-netty-1.14.0.jar (Root Library) - netty-codec-http2-4.1.27.Final.jar - :x: **netty-handler-4.1.27.Final.jar** (Vulnerable Library)
Found in HEAD commit: 722089816e5192b667c19cb836256ef6da8be1ac
Found in base branch: master
Netty 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.
Publish Date: 2021-02-08
URL: CVE-2021-21290
Base Score Metrics: - Exploitability Metrics: - Attack Vector: Local - Attack Complexity: Low - Privileges Required: None - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: High - Integrity Impact: None - Availability Impact: None
For more information on CVSS3 Scores, click here.Type: Upgrade version
Origin: https://github.com/netty/netty/security/advisories/GHSA-5mcr-gq6c-3hq2
Release Date: 2021-02-08
Fix Resolution (io.netty:netty-codec-http): 4.1.59.Final
Direct dependency fix Resolution (io.grpc:grpc-netty): 1.39.0
Fix Resolution (io.netty:netty-handler): 4.1.59.Final
Direct dependency fix Resolution (io.grpc:grpc-netty): 1.39.0
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