CVE-2023-34462 (Medium) detected in netty-handler-4.1.86.Final.jar
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CVE-2023-34462 - Medium Severity Vulnerability
Vulnerable Library - netty-handler-4.1.86.Final.jar
Library home page: https://netty.io/
Path to dependency file: /service-a/pom.xml
Path to vulnerable library: /home/wss-scanner/.m2/repository/io/netty/netty-handler/4.1.86.Final/netty-handler-4.1.86.Final.jar
Dependency Hierarchy:
- vertx-auth-jwt-4.3.7.jar (Root Library)
- vertx-auth-common-4.3.7.jar
- vertx-core-4.3.7.jar
- ❌ netty-handler-4.1.86.Final.jar (Vulnerable Library)
- vertx-core-4.3.7.jar
- vertx-auth-common-4.3.7.jar
Found in HEAD commit: 1ab5c078981fcdbcebc35f06a37edab5f59dfeb5
Found in base branch: master
Vulnerability Details
Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. The SniHandler
can allocate up to 16MB of heap for each channel during the TLS handshake. When the handler or the channel does not have an idle timeout, it can be used to make a TCP server using the SniHandler
to allocate 16MB of heap. The SniHandler
class is a handler that waits for the TLS handshake to configure a SslHandler
according to the indicated server name by the ClientHello
record. For this matter it allocates a ByteBuf
using the value defined in the ClientHello
record. Normally the value of the packet should be smaller than the handshake packet but there are not checks done here and the way the code is written, it is possible to craft a packet that makes the SslClientHelloHandler
. This vulnerability has been fixed in version 4.1.94.Final.
Publish Date: 2023-06-22
URL: CVE-2023-34462
CVSS 3 Score Details (6.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: Low
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
Suggested Fix
Type: Upgrade version
Origin: GHSA-6mjq-h674-j845
Release Date: 2023-06-22
Fix Resolution (io.netty:netty-handler): 4.1.94.Final
Direct dependency fix Resolution (io.vertx:vertx-auth-jwt): 4.4.4
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This issue won't be fixed & marked as invalid. Closed!