VDB-182715 · CVE-2021-3796 · Nessus 212490

Vim use after free

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.
7.1	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Vim. Impacted is an unknown function. Performing a manipulation results in use after free. This vulnerability is known as CVE-2021-3796. Remote exploitation of the attack is possible. No exploit is available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in Vim (Word Processing Software) (affected version unknown). It has been classified as critical. This affects an unknown functionality. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was published 09/15/2021 as 35a9a00afcb20897d462a766793ff45534810dc3. It is possible to read the advisory at huntr.dev. This vulnerability is uniquely identified as CVE-2021-3796 since 09/11/2021. 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 35a9a00afcb20897d462a766793ff45534810dc3 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). Statistical analysis made it clear that VulDB provides the best quality 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: 7.2
VulDB Meta Temp Score: 7.1

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

CNA Base Score: 8.2
CNA Vector (huntr.dev): 🔍

CVSSv2info

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

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

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

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
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: 35a9a00afcb20897d462a766793ff45534810dc3

Timelineinfo

09/11/2021 🔍
09/15/2021 +4 days 🔍
09/15/2021 +0 days 🔍
05/03/2025 +1326 days 🔍

Sourcesinfo

Product: github.com

Advisory: 35a9a00afcb20897d462a766793ff45534810dc3
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-3796 (🔍)
GCVE (CVE): GCVE-0-2021-3796
GCVE (VulDB): GCVE-100-182715

Entryinfo

Created: 09/15/2021 16:39
Updated: 05/03/2025 11:14
Changes: 09/15/2021 16:39 (49), 09/19/2021 06:50 (2), 12/12/2024 22:57 (16), 05/03/2025 11:14 (3)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.