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MitreCVE-2021-43413

HistoryNov 07, 2021 - 6:15 p.m.

CVE-2021-43413

2021-11-0718:15:07

mitre

web.nvd.nist.gov

cve-2021-43413

gnu hurd

security vulnerability

root access

file modification

nvd

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:L/Au:S/C:C/I:C/A:C

CVSS3

8.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

8.5

Confidence

High

EPSS

0.005

Percentile

77.0%

JSON

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.

Affected configurations

Nvd

Node

gnuhurdRange<0.9.20210404-9

VendorProductVersionCPE
gnuhurd*cpe:2.3:a:gnu:hurd:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
gnu	hurd	*	cpe:2.3:a:gnu:hurd::::::::

References

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

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

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

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

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:L/Au:S/C:C/I:C/A:C

CVSS3

8.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

8.5

Confidence

High

EPSS

0.005

Percentile

77.0%

JSON

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