Bug 2097768 (CVE-2022-2042)

Summary:	CVE-2022-2042 vim: use after free in skipwhite may lead to crash
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	fhrdina, gchamoul, karsten, zdohnal
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	vim 8.2.5072	Doc Type:	If docs needed, set a value
Doc Text:	A heap use-after-free vulnerability was found in Vim's skipwhite() function of the src/charset.c file. This flaw occurs because of an uninitialized attribute value and freed memory in the spell command. This flaw allows an attacker to trick a user into opening a specially crafted file, triggering a heap use-after-free that causes an application to crash and corrupt 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:	2097769, 2099231
Bug Blocks:	2097770

Description Marian Rehak 2022-06-16 13:46:52 UTC

A use after free vulnerability is capable of crashing software, Bypass Protection Mechanism, Modify Memory, and possible remote execution.

Reference:

https://huntr.dev/bounties/8628b4cd-4055-4059-aed4-64f7fdc10eba
https://github.com/vim/vim/commit/2813f38e021c6e6581c0c88fcf107e41788bc835

Comment 1 Marian Rehak 2022-06-16 13:47:07 UTC

Created vim tracking bugs for this issue:

Affects: fedora-all [bug 2097769]