VDB-216207 · CVE-2021-4250 · GCVE-100-216207

cgriego active_attr up to 0.15.2 Regex boolean_typecaster.rb call Value denial of service

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.7	$0-$5k	0.00

Summaryinfo

A vulnerability was found in cgriego active_attr up to 0.15.2. It has been classified as problematic. This affects the function call of the file lib/active_attr/typecasting/boolean_typecaster.rb of the component Regex Handler. Performing a manipulation of the argument Value results in denial of service. This vulnerability is reported as CVE-2021-4250. Moreover, an exploit is present. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in cgriego active_attr up to 0.15.2. This affects the function call of the file lib/active_attr/typecasting/boolean_typecaster.rb of the component Regex Handler. The manipulation of the argument value with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability.

The weakness was disclosed 12/18/2022. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2021-4250. Technical details and a public exploit are known.

The exploit is shared for download at github.com. It is declared as proof-of-concept.

Upgrading to version 0.15.3 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch dab95e5843b01525444b82bd7b336ef1d79377df is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

cgriego

Name

active_attr

Version

License

open-source

Website

Product: https://github.com/cgriego/active_attr/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

VulDB Base Score: 3.5
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 3.5
CNA Vector (VulDB): 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: active_attr 0.15.3
Patch: dab95e5843b01525444b82bd7b336ef1d79377df

Timelineinfo

12/18/2022 🔍
12/18/2022 +0 days 🔍
12/18/2022 +0 days 🔍
01/15/2023 +28 days 🔍

Sourcesinfo

Product: github.com

Advisory: dab95e5843b01525444b82bd7b336ef1d79377df
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-4250 (🔍)
GCVE (CVE): GCVE-0-2021-4250
GCVE (VulDB): GCVE-100-216207
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 12/18/2022 22:00
Updated: 01/15/2023 09:36
Changes: 12/18/2022 22:00 (49), 12/24/2022 15:05 (3), 01/15/2023 09:32 (3), 01/15/2023 09:36 (21)
Complete: 🔍
Cache ID: 216::103