The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS: rsh-client 0.17-17ubuntu0.1 rsh-server 0.17-17ubuntu0.1 In general, a standard system update will make all the necessary changes.
https://ubuntu.com/security/notices/USN-5327-1
CVE-2019-7282
https://launchpad.net/ubuntu/+source/netkit-rsh/0.17-17ubuntu0.1
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