Vulnerability · Published Oct 15, 2021 · Assigned by @huntrdev

CVE-2021-3875Heap-based Buffer Overflow in vim/vim

High 7.8

In plain English

A high-severity heap buffer overflow in vim/vim from vim. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.5% (higher than 75% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.0)7.8High

Exploit odds (30 days)1.5%top 24.8% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

vim is vulnerable to Heap-based Buffer Overflow

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Alpine:v3.20	vim	8.2.3500-r0	ALPINE-CVE-2021-3875
Alpine:v3.21	vim	8.2.3500-r0	ALPINE-CVE-2021-3875
Alpine:v3.22	vim	8.2.3500-r0	ALPINE-CVE-2021-3875
Alpine:v3.23	vim	8.2.3500-r0	ALPINE-CVE-2021-3875
Alpine:v3.24	vim	8.2.3500-r0	ALPINE-CVE-2021-3875
Debian:12	vim	2:8.2.3565-1	DEBIAN-CVE-2021-3875
Debian:13	vim	2:8.2.3565-1	DEBIAN-CVE-2021-3875
Debian:14	vim	2:8.2.3565-1	DEBIAN-CVE-2021-3875
Ubuntu:22.04:LTS	vim	2:8.2.3565-1ubuntu2	UBUNTU-CVE-2021-3875

Affected products (as reported)

Vendor	Product	Versions
vim	vim/vim	unspecified – before 8.2.3489

Weakness: CWE-122 · Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

https://huntr.dev/bounties/5cdbc168-6ba1-4bc2-ba6c-28be12166a53 x_refsource_CONFIRM
https://github.com/vim/vim/commit/35a319b77f897744eec1155b736e9372c9c5575f x_refsource_MISC
FEDORA-2021-84f4cf3244 vendor-advisory, x_refsource_FEDORA
FEDORA-2021-6988830606 vendor-advisory, x_refsource_FEDORA
[oss-security] 20220114 Re: 3 new CVE's in vim mailing-list, x_refsource_MLIST
GLSA-202208-32 vendor-advisory, x_refsource_GENTOO