CVE-2021-43414
An issue was discovered in GNU Hurd before 0.9 20210404-9. The use of an authentication protocol in the proc server is vulnerable to man-in-the-middle attacks, which can be exploited for local privilege escalation to get full root access.
Date published : 2021-11-07
https://lists.gnu.org/archive/html/bug-hurd/2021-05/msg00079.html