Bug 2151558 (CVE-2022-4292)

Summary:	CVE-2022-4292 vim: use-after-free in did_set_spelllang() in src/spell.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:	jburrell, zdohnal
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	vim 9.0.0882	Doc Type:	If docs needed, set a value
Doc Text:	A heap use-after-free flaw was found in Vim's did_set_spelllang() function of the spell.c file. This issue occurs because vim uses freed memory after SpellFileMissing autocmd uses bwipe. This could allows an attacker to trick a user into opening a specially crafted file, triggering a heap use-after-free issue that causes an application to crash, possibly executing code and corrupting memory.	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:	2151559, 2156271, 2156272
Bug Blocks:	2151568

Description Guilherme de Almeida Suckevicz 2022-12-07 13:56:14 UTC

Use After Free in GitHub repository vim/vim prior to 9.0.0882.

Reference:
https://huntr.dev/bounties/da3d4c47-e57a-451e-993d-9df0ed31f57b

Upstream patch:
https://github.com/vim/vim/commit/c3d27ada14acd02db357f2d16347acc22cb17e93

Comment 1 Guilherme de Almeida Suckevicz 2022-12-07 13:56:28 UTC

Created vim tracking bugs for this issue:

Affects: fedora-all [bug 2151559]