A critical vulnerability, commonly called “Ghost,” allows attackers to execute malicious code on Linux-based systems. For details on this vulnerability, see http://arstechnica.com/security/2015/01/highly-critical-ghost-allowing-code-execution-affects-most-linux-systems/.
The following versions of Ubuntu already include protection against the vulnerability:
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- Ubuntu 12.04 LTS: libc6 2.15-0ubuntu10.10
- Ubuntu 10.04 LTS: libc6 2.11.1-0ubuntu7.20
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To determine the currently installed version of Ubuntu, enter the following command in a Terminal window:
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ldd --version
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If you have an Ubuntu version that is older than the versions show above, run the following command in a Terminal window to install a patch that protects against the vulnerability:
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sudo apt-get update && sudo apt-get dist-upgrade
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Protecting-Linux-based-exacqVision-Systems-from-the-Ghost-Vulnerability.pdf