The new Apache MINA SSHD 2.9.2 release also fixes CVE-2022-45047.
-------- Forwarded Message --------
Subject: CVE-2022-45047: Apache MINA SSHD: Java unsafe deserialization
vulnerability
Date: Tue, 15 Nov 2022 23:08:17 +0000
From: Thomas Wolf <tw...@apache.org>
Reply-To: d...@mina.apache.org
To: annou...@apache.org, d...@mina.apache.org
Severity: important
Description:
Class org.apache.sshd.server.keyprovider.SimpleGeneratorHostKeyProvider
in Apache MINA SSHD <= 2.9.1 uses Java deserialization to load a
serialized java.security.PrivateKey. The class is one of several
implementations that an implementor using Apache MINA SSHD can choose
for loading the host keys of an SSH server.
Mitigation:
For Apache MINA SSHD <= 2.9.1, do not use
org.apache.sshd.server.keyprovider.SimpleGeneratorHostKeyProvider to
generate and later load your server's host key. Use separately generated
host key files, for instance in OpenSSH format, and load them via a
org.apache.sshd.common.keyprovider.FileKeyPairProvider instead. Or use a
custom implementation instead of SimpleGeneratorHostKeyProvider that
uses the OpenSSH format for storing and loading the host key (via
classes OpenSSHKeyPairResourceWriter and OpenSSHKeyPairResourceParser).
The issue was fixed in Apache MINA SSHD 2.9.2.
Credit:
The Apache MINA SSHD team would like to thank Zhang Zewei, NOFOCUS, for
reporting this issue.
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