CVE-2021-4115

2022-02-1400:00:00

ubuntu.com

polkit

flaw

unprivileged

crash

file descriptor

exhaustion

availability

CVSS2

2.1

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.001

Percentile

43.4%

JSON

There is a flaw in polkit which can allow an unprivileged user to cause
polkit to crash, due to process file descriptor exhaustion. The highest
threat from this vulnerability is to availability. NOTE: Polkit process
outage duration is tied to the failing process being reaped and a new one
being spawned

Notes

Author	Note
mdeslaur	Introduced by backported patch in focal+: PolkitSystemBusName-Retrieve-both-pid-and-uid.patch

OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchpolicykit-1< 0.105-26ubuntu1.3UNKNOWN
ubuntu21.10noarchpolicykit-1< 0.105-31ubuntu0.2UNKNOWN