Bug 2034720 (CVE-2021-4136)

Summary:	CVE-2021-4136 vim: heap-based buffer overflow in eval_lambda() in src/eval.c
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	bdettelb, caswilli, dhalasz, fjansen, gchamoul, gparvin, jburrell, jwong, karsten, kaycoth, micjohns, njean, pahickey, stcannon, sthirugn, vkrizan, vkumar, vmugicag, zdohnal
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	vim 8.2.3847	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.	Story Points:	---
Clone Of:		Environment:
Last Closed:		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:	2034721, 2034780
Bug Blocks:	2034722

Description Guilherme de Almeida Suckevicz 2021-12-21 19:47:22 UTC

Vim is vulnerable to heap-based buffer overflow.

Reference:
https://huntr.dev/bounties/5c6b93c1-2d27-4e98-a931-147877b8c938

Upstream patch:
https://github.com/vim/vim/commit/605ec91e5a7330d61be313637e495fa02a6dc264

Comment 1 Guilherme de Almeida Suckevicz 2021-12-21 19:47:42 UTC

Created vim tracking bugs for this issue:

Affects: fedora-all [bug 2034721]