CVE-2021-43413

high

Description

An issue was discovered in GNU Hurd before 0.9 20210404-9. A single pager port is shared among everyone who mmaps a file, allowing anyone to modify any files that they can read. This can be trivially exploited to get full root access.

References

https://www.mail-archive.com/bug-hurd%40gnu.org/msg32113.html

https://lists.gnu.org/archive/html/bug-hurd/2021-05/msg00079.html

https://lists.gnu.org/archive/html/bug-hurd/2005-06/msg00191.html

https://lists.gnu.org/archive/html/bug-hurd/2002-11/msg00263.html

Details

Source: Mitre, NVD

Published: 2021-11-07

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 9

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 8.8

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H