Bug 2028122 (CVE-2021-3984)

Summary:	CVE-2021-3984 vim: illegal memory access in find_start_brace() in cindent.c when C-indenting
Product:	[Other] Security Response	Reporter:	Michael Kaplan <mkaplan>
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, jburrell, jnakfour, jramanat, jwong, karsten, kaycoth, pahickey, psegedy, stcannon, vkumar, vmugicag, zdohnal
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	vim 8.2.3625	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in vim. A possible heap-based buffer overflow allows an attacker to input a specially crafted file, leading to a crash or code execution. The highest threat from this vulnerability is confidentiality, integrity, and system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-02-01 22:01:13 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:	2028339, 2028340, 2028341, 2028342, 2029174, 2029335, 2029339
Bug Blocks:	2028123

Description Michael Kaplan 2021-12-01 14:23:22 UTC

vim is vulnerable to Heap-based Buffer Overflow. There is an illegal memory access when C-indenting.

References:

https://github.com/vim/vim/commit/2de9b7c7c8791da8853a9a7ca9c467867465b655
https://huntr.dev/bounties/b114b5a2-18e2-49f0-b350-15994d71426a

Comment 2 Sandipan Roy 2021-12-02 04:57:06 UTC

Created vim tracking bugs for this issue:

Affects: fedora-all [bug 2028339]

Comment 5 errata-xmlrpc 2022-02-01 21:00:55 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:0366 https://access.redhat.com/errata/RHSA-2022:0366

Comment 6 Product Security DevOps Team 2022-02-01 22:01:10 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-2021-3984