Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS0yd3czLWZ4dnEtMjkzas0WBQ

NLTK Vulnerable to REDoS

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() function in the file nltk/corpus/reader/comparative_sents.py may cause an application to consume an excessive amount of CPU.

Permalink: https://github.com/advisories/GHSA-2ww3-fxvq-293j
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS0yd3czLWZ4dnEtMjkzas0WBQ
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: over 2 years ago
Updated: 8 months ago

CVSS Score: 7.5
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Identifiers: GHSA-2ww3-fxvq-293j, CVE-2021-3828
References:

• https://nvd.nist.gov/vuln/detail/CVE-2021-3828
• https://github.com/nltk/nltk/pull/2816
• https://github.com/nltk/nltk/commit/277711ab1dec729e626b27aab6fa35ea5efbd7e6
• https://huntr.dev/bounties/d19aed43-75bc-4a03-91a0-4d0bb516bc32
• https://github.com/advisories/GHSA-2ww3-fxvq-293j

Repository: https://github.com/nltk/nltk
Blast Radius: 35.7

Affected Packages