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    CVE-2023-34462

    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.

    Published:Jun 22, 2023
    Last Modified:Feb 13, 2025
    EPS:Jun 22, 2023
    EPSS Score:0.00563
    CVSS Score:6.5

    Affected Products

    Vendor
    Netty
    Product
    Netty
    Vendor
    Redhat
    Product
    Amq Broker
    Vendor
    Redhat
    Product
    Amq Clients
    Vendor
    Redhat
    Product
    Amq Streams
    Vendor
    Redhat
    Product
    Camel K
    Vendor
    Redhat
    Product
    Camel Spring Boot
    Vendor
    Redhat
    Product
    Cryostat
    Vendor
    Redhat
    Product
    Jboss Data Grid
    Vendor
    Redhat
    Product
    Jboss Enterprise Application Platform
    Vendor
    Redhat
    Product
    Quarkus
    Vendor
    Redhat
    Product
    Service Registry

    Exploits

    https://github.com/netty/netty/security/advisories/GHSA-6mjq-h674-j845https://github.com/netty/netty/security/advisories/GHSA-6mjq-h674-j845

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High