USN-5848-1: less vulnerability

9 February 2023

Use of less could result in a denial of service

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Releases

Packages

  • less - pager program similar to more

Details

David Leadbeater discovered that less was not properly handling escape
sequences when displaying raw control characters. A maliciously formed
OSC 8 hyperlink could possibly be used by an attacker to cause a denial of
service.

Reduce your security exposure

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.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 22.10
Ubuntu 22.04

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

References

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Further reading