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Ubuntu 24.04: USN-6756-1 Critical: less Command Execution Threat

ubuntu
Calendar Grey April 29, 2024
Dist Ubuntu Esm H88
Reduced exposure in Ubuntu may enable command execution through malicious files. Ensure your systems are updated to keep them protected.
less could be made run programs as your login if it opened a specially crafted file.

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 24.04 LTS - Ubuntu 23.10 - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS Summary: less could be made run programs as your login if it opened a specially crafted file. Software Description: - less: pager program similar to more Details: It was discovered that less mishandled newline characters in file names. If a user or automated system were tricked into opening specially crafted files, an attacker could possibly use this issue to execute arbitrary commands on the host.

Topics%20covered

Topics Covered

security advisory critical issue software update command execution Ubuntu security notice less program

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 24.04 LTS   less                            590-2ubuntu2.1 Ubuntu 23.10   less                            590-2ubuntu0.23.10.2 Ubuntu 22.04 LTS   less                            590-1ubuntu0.22.04.3 Ubuntu 20.04 LTS   less                            551-1ubuntu0.3 Ubuntu 18.04 LTS   less                            487-0.1ubuntu0.1~esm2                                   Available with Ubuntu Pro Ubuntu 16.04 LTS   less                            481-2.1ubuntu0.2+esm2                                   Available with Ubuntu Pro Ubuntu 14.04 LTS   less                            458-2ubuntu0.1~esm1                                   Available with Ubuntu Pro In general, a standard system update will make all the necessary changes.

References

  https://ubuntu.com/security/notices/USN-6756-1

  CVE-2024-32487

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6756-1

Topics%20covered

Topics Covered

security advisory critical issue software update command execution Ubuntu security notice less program

Package Information

  https://launchpad.net/ubuntu/+source/less/590-2ubuntu2.1   https://launchpad.net/ubuntu/+source/less/590-2ubuntu0.23.10.2   https://launchpad.net/ubuntu/+source/less/590-1ubuntu0.22.04.3   https://launchpad.net/ubuntu/+source/less/551-1ubuntu0.3

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