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USN-5327-1: rsh vulnerability

15 March 2022

rsh would allow unintended modification of target directory permissions.



  • netkit-rsh - client programs for remote shell connections


Hiroyuki Yamamori discovered that rsh incorrectly handled certain
filenames. If a user or automated system were tricked into connecting to a
malicious rsh server, a remote attacker could possibly use this issue to
modify directory permissions.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 18.04

In general, a standard system update will make all the necessary changes.