Uninstall rpcbind Package
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Description
The rpcbind utility maps RPC services to the ports on which they listen.
RPC processes notify rpcbind when they start, registering the ports they
are listening on and the RPC program numbers they expect to serve. The
rpcbind service redirects the client to the proper port number so it can
communicate with the requested service. If the system does not require RPC
(such as for NFS servers) then this service should be disabled.
The rpcbind
package can be removed with the following command:
Rationale
If the system does not require rpc based services, it is recommended that
rpcbind be disabled to reduce the attack surface.
Shell script
The following script can be run on the host to remediate the issue.
#!/bin/bash
# Remediation is applicable only in certain platforms
if dpkg-query --show --showformat='${db:Status-Status}
' 'kernel' 2>/dev/null | grep -q installed; then
# CAUTION: This remediation script will remove rpcbind
# from the system, and may remove any packages
# that depend on rpcbind. Execute this
# remediation AFTER testing on a non-production
# system!
DEBIAN_FRONTEND=noninteractive apt-get remove -y "rpcbind"
else
>&2 echo 'Remediation is not applicable, nothing was done'
fi
Ansible playbook
The following playbook can be run with Ansible to remediate the issue.
- name: Gather the package facts
package_facts:
manager: auto
tags:
- disable_strategy
- low_complexity
- low_disruption
- low_severity
- no_reboot_needed
- package_rpcbind_removed
- name: Ensure rpcbind is removed
package:
name: rpcbind
state: absent
when: '"kernel" in ansible_facts.packages'
tags:
- disable_strategy
- low_complexity
- low_disruption
- low_severity
- no_reboot_needed
- package_rpcbind_removed