CVE-2021-43414

CVE-2021-43414 describes a local privilege escalation vulnerability in GNU Hurd versions prior to 0.9 20210404-9. An attacker can exploit a man-in-the-middle flaw in the proc server's authentication protocol to gain full root access. Rated with a CVSS score of 7.0 HIGH, this vulnerability requires local access and has high impact on confidentiality, integrity, and availability, though it has high attack complexity. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage surrounding this CVE.