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.
The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Sshd | Apache | * | 2.9.1 (including) |
| OCP-Tools-4.12-RHEL-8 | RedHat | jenkins-2-plugins-0:4.12.1675702407-1.el8 | * |
| OpenShift Developer Tools and Services for OCP 4.11 | RedHat | jenkins-2-plugins-0:4.11.1683009941-1.el8 | * |
| Red Hat build of Quarkus | RedHat | * | |
| Red Hat build of Quarkus Platform 2.7.6.SP3 | RedHat | sshd-common | * |
| Red Hat Data Grid 8.4.1 | RedHat | mina-sshd | * |
| Red Hat Data Grid 8.4.4 | RedHat | * | |
| Red Hat JBoss Enterprise Application Platform 7 | RedHat | sshd-common | * |
| Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 8 | RedHat | eap7-apache-sshd-0:2.9.2-1.redhat_00001.1.el8eap | * |
| Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 9 | RedHat | eap7-apache-sshd-0:2.9.2-1.redhat_00001.1.el9eap | * |
| Red Hat JBoss Enterprise Application Platform 7.4 on RHEL 7 | RedHat | eap7-apache-sshd-0:2.9.2-1.redhat_00001.1.el7eap | * |
| Red Hat OpenShift Container Platform 4.10 | RedHat | jenkins-2-plugins-0:4.10.1675144701-1.el8 | * |
| Red Hat OpenShift Container Platform 4.9 | RedHat | jenkins-2-plugins-0:4.9.1675668922-1.el8 | * |
| Red Hat Single Sign-On 7 | RedHat | sshd-common | * |
| Red Hat Single Sign-On 7.6 for RHEL 7 | RedHat | rh-sso7-keycloak-0:18.0.6-1.redhat_00001.1.el7sso | * |
| Red Hat Single Sign-On 7.6 for RHEL 8 | RedHat | rh-sso7-keycloak-0:18.0.6-1.redhat_00001.1.el8sso | * |
| Red Hat Single Sign-On 7.6 for RHEL 9 | RedHat | rh-sso7-keycloak-0:18.0.6-1.redhat_00001.1.el9sso | * |
| Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | RedHat | vdsm-0:4.50.3.6-1.el8ev | * |
| Red Hat Virtualization Engine 4.4 | RedHat | apache-sshd-1:2.9.2-0.1.el8ev | * |
| RHEL-8 based Middleware Containers | RedHat | rh-sso-7/sso76-openshift-rhel8:7.6-20 | * |
| RHINT Camel-Springboot 3.18.3.P2 | RedHat | * | |
| RHPAM 7.13.4 async | RedHat | mina-sshd | * |
It is often convenient to serialize objects for communication or to save them for later use. However, deserialized data or code can often be modified without using the provided accessor functions if it does not use cryptography to protect itself. Furthermore, any cryptography would still be client-side security – which is a dangerous security assumption. Data that is untrusted can not be trusted to be well-formed. When developers place no restrictions on “gadget chains,” or series of instances and method invocations that can self-execute during the deserialization process (i.e., before the object is returned to the caller), it is sometimes possible for attackers to leverage them to perform unauthorized actions, like generating a shell.