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.
Published 2022-02-16 19:15:08
Updated 2025-01-29 22:15:27
Source Red Hat, Inc.
View at NVD,   CVE.org

Products affected by CVE-2021-3560

CVE-2021-3560 is in the CISA Known Exploited Vulnerabilities Catalog

CISA vulnerability name:
Red Hat Polkit Incorrect Authorization Vulnerability
CISA required action:
Apply updates per vendor instructions.
CISA description:
Red Hat Polkit contains an incorrect authorization vulnerability through the bypassing of credential checks for D-Bus requests, allowing for privilege escalation.
Notes:
https://bugzilla.redhat.com/show_bug.cgi?id=1961710; https://nvd.nist.gov/vuln/detail/CVE-2021-3560
Added on 2023-05-12 Action due date 2023-06-02

Exploit prediction scoring system (EPSS) score for CVE-2021-3560

1.37%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 86 %
Percentile, the proportion of vulnerabilities that are scored at or less

Metasploit modules for CVE-2021-3560

  • Polkit D-Bus Authentication Bypass
    Disclosure Date: 2021-06-03
    First seen: 2021-07-08
    exploit/linux/local/polkit_dbus_auth_bypass
    A vulnerability exists within the polkit system service that can be leveraged by a local, unprivileged attacker to perform privileged operations. In order to leverage the vulnerability, the attacker invokes a method over D-Bus and kills the client process. This will oc

CVSS scores for CVE-2021-3560

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
7.2
HIGH AV:L/AC:L/Au:N/C:C/I:C/A:C
3.9
10.0
NIST
7.8
HIGH CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
1.8
5.9
134c704f-9b21-4f2e-91b3-4a467353bcc0 2025-01-29
7.8
HIGH CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
1.8
5.9
NIST

CWE ids for CVE-2021-3560

  • The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.
    Assigned by: nvd@nist.gov (Primary)
  • The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
    Assigned by: secalert@redhat.com (Secondary)

References for CVE-2021-3560

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