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

Vulnerability from cvelistv5 – Published: 2022-02-16 00:00 – Updated: 2025-10-21 23:15
VLAI CISA KEV
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 (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a polkit Affected: polkit 0.119
CISA KEV
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: 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 12:26 UTC | Updated: 2026-02-06 07:17 UTC
Show details on NVD website
To clipboard 

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      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=1961710\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://github.blog/2021-06-10-privilege-escalation-polkit-root-on-linux-with-bug/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://packetstormsecurity.com/files/172836/polkit-Authentication-Bypass.html\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://packetstormsecurity.com/files/172846/Facebook-Fizz-Denial-Of-Service.html\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-03T17:01:06.571Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-3560\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"active\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-01-29T21:24:12.585039Z\"}}}, {\"other\": {\"type\": \"kev\", \"content\": {\"dateAdded\": \"2023-05-12\", \"reference\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-3560\"}}}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2023-05-12T00:00:00.000Z\", \"value\": \"CVE-2021-3560 added to CISA KEV\"}], \"references\": [{\"url\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-3560\", \"tags\": [\"government-resource\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-01-29T21:24:29.934Z\"}}], \"cna\": {\"affected\": [{\"vendor\": \"n/a\", \"product\": \"polkit\", \"versions\": [{\"status\": \"affected\", \"version\": \"polkit 0.119\"}]}], \"references\": [{\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=1961710\"}, {\"url\": \"https://github.blog/2021-06-10-privilege-escalation-polkit-root-on-linux-with-bug/\"}, {\"url\": \"http://packetstormsecurity.com/files/172836/polkit-Authentication-Bypass.html\"}, {\"url\": \"http://packetstormsecurity.com/files/172846/Facebook-Fizz-Denial-Of-Service.html\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-863\", \"description\": \"CWE-863\"}]}], \"providerMetadata\": {\"orgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"shortName\": \"redhat\", \"dateUpdated\": \"2023-06-12T06:06:22.689Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-3560\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-21T23:15:46.259Z\", \"dateReserved\": \"2021-05-20T00:00:00.000Z\", \"assignerOrgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"datePublished\": \"2022-02-16T00:00:00.000Z\", \"assignerShortName\": \"redhat\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Tags
Taxonomy of the tags.





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.