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CVE-2021-3560

Published: 3 June 2021

It was found that polkit could be tricked into bypassing the credential checks for D-Bus requests, elevating the privileges of the requestor to the root user. This flaw could be used by an unprivileged local attacker to, for example, create a new local administrator. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Notes

AuthorNote
mdeslaur
commit introducing issue was backported to policykit-1 version
in Ubuntu in focal+

Priority

High

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package Release Status
policykit-1
Launchpad, Ubuntu, Debian
jammy
Released (0.105-31)
impish
Released (0.105-31)
trusty Not vulnerable
(code not present)
bionic Not vulnerable
(code not present)
focal
Released (0.105-26ubuntu1.1)
groovy
Released (0.105-29ubuntu0.1)
hirsute
Released (0.105-30ubuntu0.1)
upstream Needs triage

xenial Not vulnerable
(code not present)

Severity score breakdown

Parameter Value
Base score 7.8
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H