Bug 2004728 (CVE-2021-3796)

Summary:	CVE-2021-3796 vim: use-after-free in nv_replace() in normal.c
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bdettelb, caswilli, fjansen, gchamoul, gghezzo, gparvin, jnakfour, jramanat, jwong, karsten, kaycoth, kyoneyam, pahickey, psegedy, saroy, security-response-team, stcannon, vkumar, vmugicag, yozone, zdohnal
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	vim 8.2.3428	Doc Type:	If docs needed, set a value
Doc Text:	A use-after-free vulnerability in vim could allow an attacker to input a specially crafted file leading to memory corruption and a potentially exploitable 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:	2021-12-08 10:04:21 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:	2004729, 2004973, 2004974, 2004975, 2004976, 2006820, 2006821, 2006823, 2006824
Bug Blocks:	2004623

Description Guilherme de Almeida Suckevicz 2021-09-15 19:55:48 UTC

vim is vulnerable to Use After Free

Reference:
https://huntr.dev/bounties/ab60b7f3-6fb1-4ac2-a4fa-4d592e08008d

Upstream patch:
https://github.com/vim/vim/commit/35a9a00afcb20897d462a766793ff45534810dc3

Comment 1 Guilherme de Almeida Suckevicz 2021-09-15 19:56:05 UTC

Created vim tracking bugs for this issue:

Affects: fedora-all [bug 2004729]

Comment 9 errata-xmlrpc 2021-11-09 19:04:21 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:4517 https://access.redhat.com/errata/RHSA-2021:4517

Comment 10 Product Security DevOps Team 2021-12-08 10:04:19 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-3796