CVE-2024-41909: Apache MINA SSHD: integrity check bypass

[Arnout Engelen <engelen () apache org>]

Severity: moderate

Affected versions:

- Apache MINA SSHD through 2.11.0

Description:

Like many other SSH implementations, Apache MINA SSHD suffered from the issue that is more widely known as 
CVE-2023-48795. An attacker that can intercept traffic between client and server could drop certain packets from the 
stream, potentially causing client and server to consequently end up with a connection for which 
some security features have been downgraded or disabled, aka a Terrapin 
attack

The mitigations to prevent this type of attack were implemented in Apache MINA SSHD 2.12.0, both client and server 
side. Users are recommended to upgrade to at least this version. Note that both the client and the server 
implementation must have mitigations applied against this issue, otherwise the connection may still be affected.

Credit:

Fabian Bäumer (finder)

References:

https://github.com/apache/mina-sshd/issues/445
https://mina.apache.org/
https://www.cve.org/CVERecord?id=CVE-2024-41909