Vulnerability-Lookup

GHSA-2WW3-FXVQ-293J

Vulnerability from github – Published: 2021-09-29 17:14 – Updated: 2024-10-07 15:09

Summary

NLTK Vulnerable to REDoS

Details

The nltk package is vulnerable to ReDoS (regular expression denial of service). An attacker that is able to provide as an input to the [_read_comparison_block()(https://github.com/nltk/nltk/blob/23f4b1c4b4006b0cb3ec278e801029557cec4e82/nltk/corpus/reader/comparative_sents.py#L259) function in the file nltk/corpus/reader/comparative_sents.py may cause an application to consume an excessive amount of CPU.

Severity

7.5 (High)


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

8.7 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "nltk"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.6.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-3828"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1333",
      "CWE-697"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-09-28T20:49:37Z",
    "nvd_published_at": "2021-09-27T13:15:00Z",
    "severity": "HIGH"
  },
  "details": "The nltk package is vulnerable to ReDoS (regular expression denial of service). An attacker that is able to provide as an input to the [`_read_comparison_block()`(https://github.com/nltk/nltk/blob/23f4b1c4b4006b0cb3ec278e801029557cec4e82/nltk/corpus/reader/comparative_sents.py#L259) function in the file `nltk/corpus/reader/comparative_sents.py` may cause an application to consume an excessive amount of CPU.",
  "id": "GHSA-2ww3-fxvq-293j",
  "modified": "2024-10-07T15:09:21Z",
  "published": "2021-09-29T17:14:53Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-3828"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nltk/nltk/pull/2816"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nltk/nltk/commit/277711ab1dec729e626b27aab6fa35ea5efbd7e6"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-2ww3-fxvq-293j"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/nltk/nltk"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/nltk/PYSEC-2021-356.yaml"
    },
    {
      "type": "WEB",
      "url": "https://huntr.dev/bounties/d19aed43-75bc-4a03-91a0-4d0bb516bc32"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "NLTK Vulnerable to REDoS"
}

CVE-2021-3828 (GCVE-0-2021-3828)

Vulnerability from cvelistv5 – Published: 2021-09-27 12:25 – Updated: 2024-08-03 17:09

Title

Inefficient Regular Expression Complexity in nltk/nltk

Summary

nltk is vulnerable to Inefficient Regular Expression Complexity

Severity

7.5 (High)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-1333 - Inefficient Regular Expression Complexity

Assigner

@huntrdev

References

2 references

URL	Tags
https://huntr.dev/bounties/d19aed43-75bc-4a03-91a…	x_refsource_CONFIRM
https://github.com/nltk/nltk/commit/277711ab1dec7…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
nltk	nltk/nltk	Affected: unspecified , ≤ 3.6.3 (custom)

Credits

Srikanth Prathi (@srikanthprathi) Tom Aarsen (@tomaarsen)

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T17:09:09.516Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://huntr.dev/bounties/d19aed43-75bc-4a03-91a0-4d0bb516bc32"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/nltk/nltk/commit/277711ab1dec729e626b27aab6fa35ea5efbd7e6"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "nltk/nltk",
          "vendor": "nltk",
          "versions": [
            {
              "lessThanOrEqual": "3.6.3",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Srikanth Prathi (@srikanthprathi)"
        },
        {
          "lang": "en",
          "value": "Tom Aarsen (@tomaarsen)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "nltk is vulnerable to Inefficient Regular Expression Complexity"
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1333",
              "description": "CWE-1333 Inefficient Regular Expression Complexity",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-09-27T12:25:29.000Z",
        "orgId": "c09c270a-b464-47c1-9133-acb35b22c19a",
        "shortName": "@huntrdev"
      },
      "references": [
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://huntr.dev/bounties/d19aed43-75bc-4a03-91a0-4d0bb516bc32"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nltk/nltk/commit/277711ab1dec729e626b27aab6fa35ea5efbd7e6"
        }
      ],
      "source": {
        "advisory": "d19aed43-75bc-4a03-91a0-4d0bb516bc32",
        "discovery": "EXTERNAL"
      },
      "title": "Inefficient Regular Expression Complexity in nltk/nltk",
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security@huntr.dev",
          "ID": "CVE-2021-3828",
          "STATE": "PUBLIC",
          "TITLE": "Inefficient Regular Expression Complexity in nltk/nltk"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "nltk/nltk",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "\u003c=",
                            "version_value": "3.6.3"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "nltk"
              }
            ]
          }
        },
        "credit": [
          {
            "lang": "eng",
            "value": "Srikanth Prathi (@srikanthprathi)"
          },
          {
            "lang": "eng",
            "value": "Tom Aarsen (@tomaarsen)"
          }
        ],
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "nltk is vulnerable to Inefficient Regular Expression Complexity"
            }
          ]
        },
        "impact": {
          "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.0"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-1333 Inefficient Regular Expression Complexity"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://huntr.dev/bounties/d19aed43-75bc-4a03-91a0-4d0bb516bc32",
              "refsource": "CONFIRM",
              "url": "https://huntr.dev/bounties/d19aed43-75bc-4a03-91a0-4d0bb516bc32"
            },
            {
              "name": "https://github.com/nltk/nltk/commit/277711ab1dec729e626b27aab6fa35ea5efbd7e6",
              "refsource": "MISC",
              "url": "https://github.com/nltk/nltk/commit/277711ab1dec729e626b27aab6fa35ea5efbd7e6"
            }
          ]
        },
        "source": {
          "advisory": "d19aed43-75bc-4a03-91a0-4d0bb516bc32",
          "discovery": "EXTERNAL"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "c09c270a-b464-47c1-9133-acb35b22c19a",
    "assignerShortName": "@huntrdev",
    "cveId": "CVE-2021-3828",
    "datePublished": "2021-09-27T12:25:30.000Z",
    "dateReserved": "2021-09-24T00:00:00.000Z",
    "dateUpdated": "2024-08-03T17:09:09.516Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

PYSEC-2021-356

Vulnerability from pysec - Published: 2021-09-27 13:15 - Updated: 2021-10-01 22:29

Details

nltk is vulnerable to Inefficient Regular Expression Complexity

Impacted products

Name	purl
nltk	pkg:pypi/nltk

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "nltk",
        "purl": "pkg:pypi/nltk"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "277711ab1dec729e626b27aab6fa35ea5efbd7e6"
            }
          ],
          "repo": "https://github.com/nltk/nltk",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.6.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.8",
        "0.9",
        "0.9.3",
        "0.9.4",
        "0.9.5",
        "0.9.6",
        "0.9.7",
        "0.9.8",
        "0.9.9",
        "2.0.1",
        "2.0.1rc1",
        "2.0.1rc2-git",
        "2.0.1rc3",
        "2.0.1rc4",
        "2.0.2",
        "2.0.3",
        "2.0.4",
        "2.0.5",
        "2.0b4",
        "2.0b5",
        "2.0b6",
        "2.0b7",
        "2.0b8",
        "2.0b9",
        "3.0.0",
        "3.0.0b1",
        "3.0.0b2",
        "3.0.1",
        "3.0.2",
        "3.0.3",
        "3.0.4",
        "3.0.5",
        "3.1",
        "3.2",
        "3.2.1",
        "3.2.2",
        "3.2.3",
        "3.2.4",
        "3.2.5",
        "3.3",
        "3.4",
        "3.4.1",
        "3.4.2",
        "3.4.3",
        "3.4.4",
        "3.4.5",
        "3.5",
        "3.5b1",
        "3.6",
        "3.6.1",
        "3.6.2",
        "3.6.3"
      ]
    }
  ],
  "aliases": [
    "CVE-2021-3828",
    "GHSA-2ww3-fxvq-293j"
  ],
  "details": "nltk is vulnerable to Inefficient Regular Expression Complexity",
  "id": "PYSEC-2021-356",
  "modified": "2021-10-01T22:29:03.465380Z",
  "published": "2021-09-27T13:15:00Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://huntr.dev/bounties/d19aed43-75bc-4a03-91a0-4d0bb516bc32"
    },
    {
      "type": "FIX",
      "url": "https://github.com/nltk/nltk/commit/277711ab1dec729e626b27aab6fa35ea5efbd7e6"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-2ww3-fxvq-293j"
    }
  ]
}

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.

Action not permitted

GHSA-2WW3-FXVQ-293J

CVE-2021-3828 (GCVE-0-2021-3828)

PYSEC-2021-356

Tags

Sightings

Nomenclature