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MitreCVE-2021-43412

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

CVE-2021-43412

2021-11-0718:15:07

CWE-416

mitre

web.nvd.nist.gov

cve-2021-43412

gnu hurd

libports

notification messages

port use-after-free

local privilege escalation

nvd

CVSS2

7.2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

7.6

Confidence

High

EPSS

Percentile

5.1%

JSON

An issue was discovered in GNU Hurd before 0.9 20210404-9. libports accepts fake notification messages from any client on any port, which can lead to port use-after-free. This can be exploited for local privilege escalation to get full root access.

Affected configurations

Nvd

Node

gnuhurdRange<0.9.20210404-9

References

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

www.mail-archive.com/bug-hurd%40gnu.org/msg32116.html

CVSS2

7.2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

7.6

Confidence

High

EPSS

Percentile

5.1%

JSON

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