A vulnerability (CVE-2021-3156) in the powerful and near-ubiquitous open-source utility used on major Linux and Unix-like operating systems could allow any unprivileged local user to gain root privileges on a vulnerable host (without authentication) The heap-based buffer overflow flaw is present in. legacy versions (1.8.2 to 1.9.5p2) and all stable. stable. versions. The bug has been fixed in. Ubuntu, RedHat, Debian, Fedora, Gentoo, and others.
Source: https://www.helpnetsecurity.com/2021/01/27/cve-2021-3156/