nltk incorrect regex

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in nltk. Affected by this vulnerability is an unknown functionality. The manipulation results in incorrect regex. This vulnerability is cataloged as CVE-2021-3842. The attack may be launched remotely. There is no exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability classified as critical has been found in nltk (unknown version). Affected is an unknown code block. The manipulation with an unknown input leads to a incorrect regex vulnerability. CWE is classifying the issue as CWE-185. The product specifies a regular expression in a way that causes data to be improperly matched or compared. This is going to have an impact on availability.

The weakness was shared 01/04/2022. The advisory is shared for download at huntr.dev. This vulnerability is traded as CVE-2021-3842 since 09/30/2021. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 233286 (Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS : NLTK vulnerabilities (USN-7365-1)), which helps to determine the existence of the flaw in a target environment.

Applying the patch 2a50a3edc9d35f57ae42a921c621edc160877f4d is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (233286). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (huntr.dev): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Incorrect regex
CWE: CWE-185 / CWE-697
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 233286
Nessus Name: Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS : NLTK vulnerabilities (USN-7365-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 2a50a3edc9d35f57ae42a921c621edc160877f4d

Timelineinfo

09/30/2021 🔍
01/04/2022 +96 days 🔍
01/04/2022 +0 days 🔍
03/24/2025 +1175 days 🔍

Sourcesinfo

Product: github.com

Advisory: 2a50a3edc9d35f57ae42a921c621edc160877f4d
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-3842 (🔍)
GCVE (CVE): GCVE-0-2021-3842
GCVE (VulDB): GCVE-100-189684

Entryinfo

Created: 01/04/2022 18:56
Updated: 03/24/2025 16:10
Changes: 01/04/2022 18:56 (47), 01/06/2022 14:28 (3), 03/24/2025 16:10 (16)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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