CVE Vulnerability

CVE-2021-43411

An issue was discovered in GNU Hurd before 0.9 20210404-9. When trying to exec a setuid executable, there's a window of time when the process already has the new privileges, but still refers to the old task and is accessible through the old process port. This can be exploited to get full root access.

8.5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 6.8 / Impact : 10

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 1.6 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://salsa.debian.org/hurd-team/hurd/-/blob/4d1b079411e2f40576e7b58f9b5b78f733a2beda/debian/patches/0034-proc-Use-UIDs-for-evaluating-permissions.patch Mailing List Patch
https://lists.gnu.org/archive/html/bug-hurd/2021-05/msg00079.html Exploit Mailing List
https://www.mail-archive.com/bug-hurd@gnu.org/msg32112.html Exploit Vendor Advisory
Configurations

Configuration 1

cpe:2.3:a:gnu:hurd:*:*:*:*:*:*:*:*
Information

Published : 2021-11-07 06:15

Updated : 2022-07-12 05:42

NVD link : CVE-2021-43411

Mitre link : CVE-2021-43411

Products Affected
No products.
CWE
CWE-362