Exploits released for Linux flaw giving root on major distros

On the majority of Linux distributions, proof-of-concept attacks for a high-severity vulnerability in the dynamic loader of the GNU C Library have previously been made public online.

This security flaw, dubbed “Looney Tunables,” is listed as CVE-2023-4911 and affects Fedora 37 and 38, Ubuntu 22.04 and 23.04, and Debian 12 and 13. It is caused by a buffer overflow problem.

Attackers can use it to start programs with SUID permission and get root privileges by exploiting the GLIBC_TUNABLES environment variable that is processed by the ld.so dynamic loader.

Several security researchers have already released proof-of-concept (PoC) exploit code that is functional for various system configurations since Qualys read more Exploits released for Linux flaw giving root on major distros.

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