Vulnerability-Lookup

ubuntu-cve-2021-33430

Vulnerability from osv_ubuntu

Published

2021-12-17 19:15

Modified

2025-09-08 16:47

Summary

Details

A Buffer Overflow vulnerability exists in NumPy 1.9.x in the PyArray_NewFromDescr_int function of ctors.c when specifying arrays of large dimensions (over 32) from Python code, which could let a malicious user cause a Denial of Service. NOTE: The vendor does not agree this is a vulneraility; In (very limited) circumstances a user may be able provoke the buffer overflow, the user is most likely already privileged to at least provoke denial of service by exhausting memory. Triggering this further requires the use of uncommon API (complicated structured dtypes), which is very unlikely to be available to an unprivileged user

Severity

5.3 (Medium)


                    
                      CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2021-33430	REPORT
	https://github.com/numpy/numpy/issues/18939	REPORT
	https://github.com/numpy/numpy/pull/18989	REPORT
	https://github.com/numpy/numpy/commit/16f7824b4d9…	REPORT
	https://ubuntu.com/security/notices/USN-5763-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2021-33430	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "python3-numpy",
            "binary_version": "1:1.17.4-5ubuntu3.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "numpy",
        "purl": "pkg:deb/ubuntu/numpy@1:1.17.4-5ubuntu3.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:1.17.4-5ubuntu3.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:1.17.3-0ubuntu2",
        "1:1.17.4-3ubuntu1",
        "1:1.17.4-3ubuntu2",
        "1:1.17.4-5ubuntu2",
        "1:1.17.4-5ubuntu3"
      ]
    }
  ],
  "aliases": [],
  "details": "A Buffer Overflow vulnerability exists in NumPy 1.9.x in the PyArray_NewFromDescr_int function of ctors.c when specifying arrays of large dimensions (over 32) from Python code, which could let a malicious user cause a Denial of Service. NOTE: The vendor does not agree this is a vulneraility; In (very limited) circumstances a user may be able provoke the buffer overflow, the user is most likely already privileged to at least provoke denial of service by exhausting memory. Triggering this further requires the use of uncommon API (complicated structured dtypes), which is very unlikely to be available to an unprivileged user",
  "id": "UBUNTU-CVE-2021-33430",
  "modified": "2025-09-08T16:47:12Z",
  "published": "2021-12-17T19:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-33430"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/numpy/numpy/issues/18939"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/numpy/numpy/pull/18989"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/numpy/numpy/commit/16f7824b4d935b6aee98298ca4123d57174a6f2e"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5763-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-33430"
    }
  ],
  "related": [
    "USN-5763-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-33430"
  ]
}

CVE-2021-33430 (GCVE-0-2021-33430)

Vulnerability from cvelistv5 – Published: 2021-12-17 18:36 – Updated: 2024-08-03 23:50 Disputed

Summary

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-05-01 14:32 UTC

CWE

Assigner

mitre mitre root

References

1 reference

URL	Tags
https://github.com/numpy/numpy/issues/18939	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-33430",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-05-01T14:32:49.100885Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-06-04T17:13:00.306Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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              "x_transferred"
            ],
            "url": "https://github.com/numpy/numpy/issues/18939"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
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        }
      ],
      "problemTypes": [
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        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/numpy/numpy/issues/18939"
        }
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          "ASSIGNER": "cve@mitre.org",
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            "vendor_data": [
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                "product": {
                  "product_data": [
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                      "version": {
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                            "version_value": "n/a"
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        "references": {
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              "refsource": "MISC",
              "url": "https://github.com/numpy/numpy/issues/18939"
            }
          ]
        }
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-33430",
    "datePublished": "2021-12-17T18:36:51.000Z",
    "dateReserved": "2021-05-20T00:00:00.000Z",
    "dateUpdated": "2024-08-03T23:50:42.972Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

usn-5763-1

Vulnerability from osv_ubuntu

Published

2022-12-07 05:01

Modified

2026-02-10 04:42

Summary

numpy vulnerabilities

Details

It was discovered that NumPy did not properly manage memory when specifying arrays of large dimensions. If a user were tricked into running malicious Python file, an attacker could cause a denial of service. This issue only affected Ubuntu 20.04 LTS. (CVE-2021-33430)

It was discovered that NumPy did not properly perform string comparison operations under certain circumstances. An attacker could possibly use this issue to cause NumPy to crash, resulting in a denial of service. (CVE-2021-34141)

It was discovered that NumPy did not properly manage memory under certain circumstances. An attacker could possibly use this issue to cause NumPy to crash, resulting in a denial of service. (CVE-2021-41495, CVE-2021-41496)

References

URL

Type

	https://ubuntu.com/security/notices/USN-5763-1	ADVISORY
	https://ubuntu.com/security/CVE-2021-33430	REPORT
	https://ubuntu.com/security/CVE-2021-34141	REPORT
	https://ubuntu.com/security/CVE-2021-41495	REPORT
	https://ubuntu.com/security/CVE-2021-41496	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2021-33430",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-34141",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-41495",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-41496",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "python3-numpy",
            "binary_version": "1:1.17.4-5ubuntu3.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "numpy",
        "purl": "pkg:deb/ubuntu/numpy@1:1.17.4-5ubuntu3.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
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            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:1.17.3-0ubuntu2",
        "1:1.17.4-3ubuntu1",
        "1:1.17.4-3ubuntu2",
        "1:1.17.4-5ubuntu2",
        "1:1.17.4-5ubuntu3"
      ]
    },
    {
      "database_specific": {
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              "id": "CVE-2021-34141",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-41495",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-41496",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "python3-numpy",
            "binary_version": "1:1.21.5-1ubuntu22.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "numpy",
        "purl": "pkg:deb/ubuntu/numpy@1:1.21.5-1ubuntu22.04.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
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            },
            {
              "fixed": "1:1.21.5-1ubuntu22.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:1.19.5-1ubuntu2",
        "1:1.19.5-1ubuntu3",
        "1:1.20.2-1ubuntu1",
        "1:1.21.4-2",
        "1:1.21.5-1",
        "1:1.21.5-1build2"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that NumPy did not properly manage memory when specifying\narrays of large dimensions. If a user were tricked into running malicious\nPython file, an attacker could cause a denial of service. This issue only\naffected Ubuntu 20.04 LTS. (CVE-2021-33430)\n\nIt was discovered that NumPy did not properly perform string comparison\noperations under certain circumstances. An attacker could possibly use\nthis issue to cause NumPy to crash, resulting in a denial of service.\n(CVE-2021-34141)\n\nIt was discovered that NumPy did not properly manage memory under certain\ncircumstances. An attacker could possibly use this issue to cause NumPy to\ncrash, resulting in a denial of service. (CVE-2021-41495, CVE-2021-41496)\n",
  "id": "USN-5763-1",
  "modified": "2026-02-10T04:42:52Z",
  "published": "2022-12-07T05:01:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5763-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-33430"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-34141"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-41495"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-41496"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "numpy vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2021-33430",
    "UBUNTU-CVE-2021-34141",
    "UBUNTU-CVE-2021-41495",
    "UBUNTU-CVE-2021-41496"
  ]
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

Action not permitted

ubuntu-cve-2021-33430

Vulnerability from osv_ubuntu

CVE-2021-33430 (GCVE-0-2021-33430)

usn-5763-1

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature

Related by attack behaviour