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Debian Security Bug TrackerDEBIANCVE:CVE-2021-43413

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

CVE-2021-43413

2021-11-0718:15:07

Debian Security Bug Tracker

security-tracker.debian.org

gnu hurd

unauthorized modification

root access

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

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.

OSVersionArchitecturePackageVersionFilename
Debian999allhurd< 1:0.9.git20210404-9hurd_1:0.9.git20210404-9_all.deb

OS	Version	Architecture	Package	Version	Filename
Debian	999	all	hurd	< 1:0.9.git20210404-9	hurd_1:0.9.git20210404-9_all.deb

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

EPSS

0.005

Percentile

77.0%

JSON

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