CVE-2022-45047

Apache MINA SSHD: Java unsafe deserialization vulnerability

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.

Remediation

Workaround:

  • 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.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 3.97% Top 15%
Affected: Apache Software Foundation Apache MINA SSHD
Published at:
Updated at:

References

Link Tags
https://www.mail-archive.com/dev%40mina.apache.org/msg39312.html
https://security.netapp.com/advisory/ntap-20240216-0008/

Frequently Asked Questions

What is the severity of CVE-2022-45047?
CVE-2022-45047 has been scored as a critical severity vulnerability.
How to fix CVE-2022-45047?
As a workaround for remediating CVE-2022-45047: 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).
Is CVE-2022-45047 being actively exploited in the wild?
It is possible that CVE-2022-45047 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~4% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-45047?
CVE-2022-45047 affects Apache Software Foundation Apache MINA SSHD.
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