USN-4618-1: tmux vulnerability

5 November 2020

tmux could be made to crash or execute arbitrary code if it received a specially crafted input.

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Releases

Packages

  • tmux - terminal multiplexer

Details

Sergey Nizovtsev discovered that tmux incorrectly handled some inputs.
An attacker could possibly use this issue to cause a crash or execute arbitrary code.

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

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

Ubuntu 20.10
Ubuntu 20.04

After a standard system update you need to restart tmux session to make
all the necessary changes.

References

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Further reading