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CVE-2021-3842— Inefficient Regular Expression Complexity in nltk/nltk

Quick assessment

Affected
nltk nltk/nltk
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Nltk是一个自然语言工具包。用于支持自然语言处理的研究和开发。 nltk存在安全漏洞，该漏洞源于在处理正则表达式的过程中触发异常。

AI Predicted 5.3 Difficulty: Moderate EPSS 1.46% · P73

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2021-3842

Vulnerability Information
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Vulnerability Title
Inefficient Regular Expression Complexity in nltk/nltk
Source: CVE Program / CVE List V5
Vulnerability Description
nltk is vulnerable to Inefficient Regular Expression Complexity
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1333
Source: CVE Program / CVE List V5
Vulnerability Title
nltk 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nltk是一个自然语言工具包。用于支持自然语言处理的研究和开发。 nltk存在安全漏洞，该漏洞源于在处理正则表达式的过程中触发异常。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
nltk nltk/nltk unspecified ~ 3.6.6 -

II. Public POCs for CVE-2021-3842

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2021-3842

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Patches & Fixes for CVE-2021-3842 (1)

Vendor Advisories for CVE-2021-3842 (1)

IV. Related Vulnerabilities

Same product: nltk/nltk
Same vendor: nltk
Same weakness: CWE-1333

V. Comments for CVE-2021-3842

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