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CVE-2021-3560 (GCVE-0-2021-3560)

Vulnerability from cvelistv5 – Published: 2022-02-16 00:00 – Updated: 2025-10-21 23:15
VLAI CISA Previdian
Summary
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.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: active Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-01-29 21:24 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
n/a polkit Affected: polkit 0.119
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 559429d5-cfdf-47e1-b6cc-a5c3a2f71256

Vulnerability ID: CVE-2021-3560

Status: Confirmed

Status Updated: 2023-05-12 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2023-05-12
Asserted: 2023-05-12
Scope
Notes: KEV entry: Red Hat Polkit Incorrect Authorization Vulnerability | Affected: Red Hat / Polkit | Description: Red Hat Polkit contains an incorrect authorization vulnerability through the bypassing of credential checks for D-Bus requests, allowing for privilege escalation. | Required action: Apply updates per vendor instructions. | Due date: 2023-06-02 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://bugzilla.redhat.com/show_bug.cgi?id=1961710; https://nvd.nist.gov/vuln/detail/CVE-2021-3560
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-863
Feed CISA Known Exploited Vulnerabilities Catalog
Product Polkit
Due Date 2023-06-02
Date Added 2023-05-12
Vendorproject Red Hat
Vulnerabilityname Red Hat Polkit Incorrect Authorization Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-02-02 13:24 UTC | Updated: 2026-02-06 07:53 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 4edaddc4-6cc3-4784-8836-29cce7c94576

Vulnerability ID: CVE-2021-3560

Status: Confirmed

Status Updated: 2023-05-12 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2023-05-12
Asserted: 2023-05-12
Scope
Notes: KEVIntel entry: 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... | Affected: Linux / polkit | CVSS: 7.8 (HIGH) | Used in malware: unknown | Not yet in CISA KEV: False
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title 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...
Vendor Linux
Product polkit
Added Date 2023-05-12T00:00:00.000Z
Cvss Score 7.8
Epss Score None
Cvss Severity HIGH
Epss Percentile None
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev False
References
Created: 2026-06-23 11:14 UTC | Updated: 2026-06-23 11:14 UTC
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.