Vim heap-based overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability has been found in Vim and classified as critical. Impacted is an unknown function. The manipulation leads to heap-based overflow. This vulnerability is uniquely identified as CVE-2021-3872. The attack is possible to be carried out remotely. No exploit exists. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in Vim (Word Processing Software) (the affected version unknown). It has been rated as critical. This issue affects an unknown part. 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 disclosed 10/19/2021. It is possible to read the advisory at huntr.dev. The identification of this vulnerability is CVE-2021-3872 since 10/08/2021. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not 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 826bfe4bbd7594188e3d74d2539d9707b1c6a14b 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). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

License

Website

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

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 🔍

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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: 826bfe4bbd7594188e3d74d2539d9707b1c6a14b

Timelineinfo

10/08/2021 🔍
10/19/2021 +11 days 🔍
10/19/2021 +0 days 🔍
11/04/2025 +1477 days 🔍

Sourcesinfo

Product: github.com

Advisory: 826bfe4bbd7594188e3d74d2539d9707b1c6a14b
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-3872 (🔍)
GCVE (CVE): GCVE-0-2021-3872
GCVE (VulDB): GCVE-100-184607

Entryinfo

Created: 10/19/2021 18:27
Updated: 11/04/2025 09:43
Changes: 10/19/2021 18:27 (48), 10/23/2021 00:23 (3), 12/12/2024 22:57 (16), 05/03/2025 05:21 (3), 11/04/2025 09:43 (19)
Complete: 🔍
Cache ID: 216::103

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

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