CVE-2021-43413 Information

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.

CVSS Vector

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

Reference

https://lists.gnu.org/archive/html/bug-hurd/2021-05/msg00079.html https://lists.gnu.org/archive/html/bug-hurd/2002-11/msg00263.html https://www.mail-archive.com/bug-hurd@gnu.org/msg32113.html https://lists.gnu.org/archive/html/bug-hurd/2005-06/msg00191.html

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8