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
redhat CNA under the redhat root
CNA scorecard B 82/100 over 1212 records in the last 180 days details
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: 2acf1b60-8bdc-45a3-82f1-b983f55668f3

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: 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 12:26 UTC | Updated: 2026-11-04 13:36 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 1e8b453b-bf41-4209-a411-dd05d314c7c7

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 14:05 UTC | Updated: 2026-07-10 06:14 UTC
Show details on NVD website
To clipboard 

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}



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Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.