VDB-184484 · CVE-2021-3875 · Nessus 212490

Vim heap-based overflow

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.
7.2	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Vim. It has been declared as critical. This vulnerability affects unknown code. Such manipulation leads to heap-based overflow. This vulnerability is traded as CVE-2021-3875. 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, which was classified as critical, has been found in Vim (Word Processing Software) (version now known). Affected by this issue is some unknown processing. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is confidentiality, integrity, and availability.

The weakness was shared 10/15/2021. The advisory is shared for download at huntr.dev. This vulnerability is handled as CVE-2021-3875 since 10/09/2021. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 212490 (Amazon Linux 2022 : vim (ALAS2022-2021-001)), which helps to determine the existence of the flaw in a target environment.

Applying the patch 35a319b77f897744eec1155b736e9372c9c5575f 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 (212490). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Word Processing Software

Name

License

open-source

Website

Product: https://github.com/vim/vim/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.2

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CNA Base Score: 7.8
CNA Vector (huntr.dev): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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

Nessus ID: 212490
Nessus Name: Amazon Linux 2022 : vim (ALAS2022-2021-001)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 35a319b77f897744eec1155b736e9372c9c5575f

Timelineinfo

10/09/2021 🔍
10/15/2021 +6 days 🔍
10/15/2021 +0 days 🔍
05/03/2025 +1296 days 🔍

Sourcesinfo

Product: github.com

Advisory: 35a319b77f897744eec1155b736e9372c9c5575f
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-3875 (🔍)
GCVE (CVE): GCVE-0-2021-3875
GCVE (VulDB): GCVE-100-184484

Entryinfo

Created: 10/15/2021 19:04
Updated: 05/03/2025 05:21
Changes: 10/15/2021 19:04 (48), 10/22/2021 08:35 (3), 10/22/2021 08:36 (18), 12/12/2024 22:57 (16), 05/03/2025 05:21 (3)
Complete: 🔍
Cache ID: 216::103