ghsa-2ww3-fxvq-293j
Vulnerability from github
Published
2021-09-29 17:14
Modified
2024-10-07 15:09
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
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.

Show details on source website

To clipboard 

{
   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",
}


Log in or create an account to share your comment.

Security Advisory comment format.

This schema specifies the format of a comment related to a security advisory.

UUIDv4 of the comment
UUIDv4 of the Vulnerability-Lookup instance
When the comment was created originally
When the comment was last updated
Title of the comment
Description of the comment
The identifier of the vulnerability (CVE ID, GHSA-ID, PYSEC ID, etc.).



Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.