GSD-2020-14367

Vulnerability from gsd - Updated: 2023-12-13 01:22
Details
A flaw was found in chrony versions before 3.5.1 when creating the PID file under the /var/run/chrony folder. The file is created during chronyd startup while still running as the root user, and when it's opened for writing, chronyd does not check for an existing symbolic link with the same file name. This flaw allows an attacker with privileged access to create a symlink with the default PID file name pointing to any destination file in the system, resulting in data loss and a denial of service due to the path traversal.
Aliases
Aliases
CVE-2020-14367
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{
  "GSD": {
    "alias": "CVE-2020-14367",
    "description": "A flaw was found in chrony versions before 3.5.1 when creating the PID file under the /var/run/chrony folder. The file is created during chronyd startup while still running as the root user, and when it\u0027s opened for writing, chronyd does not check for an existing symbolic link with the same file name. This flaw allows an attacker with privileged access to create a symlink with the default PID file name pointing to any destination file in the system, resulting in data loss and a denial of service due to the path traversal.",
    "id": "GSD-2020-14367",
    "references": [
      "https://www.suse.com/security/cve/CVE-2020-14367.html",
      "https://ubuntu.com/security/CVE-2020-14367",
      "https://advisories.mageia.org/CVE-2020-14367.html",
      "https://alas.aws.amazon.com/cve/html/CVE-2020-14367.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-14367"
      ],
      "details": "A flaw was found in chrony versions before 3.5.1 when creating the PID file under the /var/run/chrony folder. The file is created during chronyd startup while still running as the root user, and when it\u0027s opened for writing, chronyd does not check for an existing symbolic link with the same file name. This flaw allows an attacker with privileged access to create a symlink with the default PID file name pointing to any destination file in the system, resulting in data loss and a denial of service due to the path traversal.",
      "id": "GSD-2020-14367",
      "modified": "2023-12-13T01:22:00.489215Z",
      "schema_version": "1.4.0"
    }
  },
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        "ID": "CVE-2020-14367",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Chrony",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "All chrony versions before 3.5.1"
                        }
                      ]
                    }
                  }
                ]
              },
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            }
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          }
        ]
      },
      "problemtype": {
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                "lang": "eng",
                "value": "CWE-59 leads to CWE-22"
              }
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            "name": "FEDORA-2020-7aa962c55e",
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            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6WKABKNLCSC3MACCWU6OM2YGWVWFWFMU/"
          },
          {
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          },
          {
            "name": "GLSA-202008-23",
            "refsource": "GENTOO",
            "url": "https://security.gentoo.org/glsa/202008-23"
          },
          {
            "name": "USN-4475-1",
            "refsource": "UBUNTU",
            "url": "https://usn.ubuntu.com/4475-1/"
          }
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    },
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                "cpe_name": [],
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          "ID": "CVE-2020-14367"
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        "data_version": "4.0",
        "description": {
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              "value": "A flaw was found in chrony versions before 3.5.1 when creating the PID file under the /var/run/chrony folder. The file is created during chronyd startup while still running as the root user, and when it\u0027s opened for writing, chronyd does not check for an existing symbolic link with the same file name. This flaw allows an attacker with privileged access to create a symlink with the default PID file name pointing to any destination file in the system, resulting in data loss and a denial of service due to the path traversal."
            }
          ]
        },
        "problemtype": {
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            },
            {
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        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 3.6,
            "confidentialityImpact": "NONE",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:L/AC:L/Au:N/C:N/I:P/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 4.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "LOW",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 6.0,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 0.8,
          "impactScore": 5.2
        }
      },
      "lastModifiedDate": "2022-12-06T20:50Z",
      "publishedDate": "2020-08-24T15:15Z"
    }
  }
}


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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.
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  • 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.



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