1. Ubuntu Security Notices
  2. USN-5327-1

USN-5327-1: rsh vulnerability

Publication date

15 March 2022

Overview

rsh would allow unintended modification of target directory permissions.

Releases

Packages

  • netkit-rsh - client programs for remote shell connections

Details

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.

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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
18.04 bionic rsh-server –  0.17-17ubuntu0.1
rsh-client –  0.17-17ubuntu0.1

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References

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