A major security hole affecting the Linux ecosystem has been patched since last night in Sudo, a application which allows administrators to grant restricted root access to others users.
The vulnerability, which has as its identifier the CVE-2021-3156, better known as "Baron Samedit", was discovered by security company Qualys two weeks ago. Fixed last night with the release of Sudo v1.9.5p2 (update immediately).
In a simple explanation provided by team του Sudo, το σφάλμα Baron Samedit μπορεί να αξιοποιηθεί από έναν εισβολέα που έχει αποκτήσει πρόσβαση σε έναν λογαριασμό με χαμηλά προνόμια για να αποκτήσει πρόσβαση root, ακόμα και αν ο account not listed in /etc/sudoers – a configuration file that controls which users are allowed access to the su or sudo commands.
For technical details see reference Qualys or the video below.
While two other Sudo security vulnerabilities have been uncovered in the last two years, the error being uncovered today is far more dangerous.
The two previous bugs, CVE-2019-14287 and CVE-2019-18634, were difficult to exploit because they required complex and non-standard settings in sudo.
Things are different for the bug revealed today, because it affects all Sudo installations where there are sudoers (/ etc / sudoers) - which is usually found on most default Linux installations - Sudo.
