Bug 2021290 (CVE-2021-3927)

Summary:	CVE-2021-3927 vim: heap-based buffer overflow in gchar_cursor() in misc1.c
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	adudiak, alcohan, aprice, bdettelb, caswilli, dfreiber, doconnor, drow, fjansen, gchamoul, gghezzo, gparvin, hkataria, jburrell, jdobes, jforrest, jkoehler, jmitchel, jnakfour, jramanat, jsamir, jtanner, jwong, karsten, kaycoth, kholdawa, kshier, lcouzens, lphiri, mpierce, mskarbek, njean, orabin, owatkins, pahickey, psegedy, rblanco, rhaigner, stcannon, sthirugn, teagle, vkrizan, vkumar, vmugicag, zdohnal
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	vim 8.2.3581	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in vim. A possible heap-based buffer overflow could allow an attacker to input a specially crafted file leading to a crash or code execution. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-11-09 12:24:28 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2021291, 2021395, 2021396
Bug Blocks:	2021294

Description Guilherme de Almeida Suckevicz 2021-11-08 18:10:44 UTC

vim is vulnerable to heap-based buffer overflow.

Reference:
https://huntr.dev/bounties/9c2b2c82-48bb-4be9-ab8f-a48ea252d1b0

Upstream patch:
https://github.com/vim/vim/commit/0b5b06cb4777d1401fdf83e7d48d287662236e7e

Comment 1 Guilherme de Almeida Suckevicz 2021-11-08 18:10:59 UTC

Created vim tracking bugs for this issue:

Affects: fedora-all [bug 2021291]