Detecting and mitigating CVE-2023-4911: Local Privilege Escalation Vulnerability

Recently, Qualys discovered and reported a critical vulnerability affecting the popular GLIBC ecosystem, which is installed by default on most Linux-based operating systems. Specifically, a buffer overflow was found in the code responsible for handling special environment variables during the startup of a process. Fortunately, exploitation of this vulnerability can be detected by Falco. In this article we will deep dive into this vulnerability, dubbed ‘Looney Tunables’, to see why it happened and how to detect and mitigate the …

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