FKIE_CVE-2021-3899

Vulnerability from fkie_nvd - Published: 2024-06-03 19:15 - Updated: 2025-08-26 17:21
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
There is a race condition in the 'replaced executable' detection that, with the correct local configuration, allow an attacker to execute arbitrary code as root.
References
security@ubuntu.comhttps://bugs.launchpad.net/ubuntu/+source/apport/+bug/1948376Issue Tracking, Patch
security@ubuntu.comhttps://ubuntu.com/security/notices/USN-5427-1Vendor Advisory
security@ubuntu.comhttps://www.cve.org/CVERecord?id=CVE-2021-3899Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1948376Issue Tracking, Patch
af854a3a-2127-422b-91ae-364da2661108https://ubuntu.com/security/notices/USN-5427-1Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.cve.org/CVERecord?id=CVE-2021-3899Third Party Advisory
Impacted products
Vendor Product Version
canonical apport *
canonical ubuntu_linux 18.04
canonical ubuntu_linux 20.04
canonical ubuntu_linux 21.10
canonical ubuntu_linux 22.04
To clipboard 

{
  "configurations": [
    {
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              "matchCriteriaId": "694303C9-A43B-485D-BF26-33CC797B8744",
              "versionEndExcluding": "2.21.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
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      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "There is a race condition in the \u0027replaced executable\u0027 detection that, with the correct local configuration, allow an attacker to execute arbitrary code as root."
    },
    {
      "lang": "es",
      "value": "Existe una condici\u00f3n de ejecuci\u00f3n en la detecci\u00f3n de \u0027ejecutable reemplazado\u0027 que, con la configuraci\u00f3n local correcta, permite a un atacante ejecutar c\u00f3digo arbitrario como root."
    }
  ],
  "id": "CVE-2021-3899",
  "lastModified": "2025-08-26T17:21:04.500",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
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        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
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          "attackVector": "LOCAL",
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          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
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          "scope": "UNCHANGED",
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
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  },
  "published": "2024-06-03T19:15:08.940",
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      "tags": [
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    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
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  ],
  "sourceIdentifier": "security@ubuntu.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "value": "CWE-367"
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      "type": "Secondary"
    }
  ]
}


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  • 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.