Bug 2102185 (CVE-2022-2207)

Summary:	CVE-2022-2207 vim: heap-based buffer overflow in function ins_bs
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:	gchamoul, karsten, zdohnal
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	vim 8.2.5162	Doc Type:	If docs needed, set a value
Doc Text:		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:	2102186, 2129174, 2129175
Bug Blocks:	2102155

Description Marian Rehak 2022-06-29 12:41:59 UTC

A heap-based buffer overflow in function ins_bs may lead to corruption of sensitive information, a crash, or code execution.

Reference:

https://huntr.dev/bounties/05bc6051-4dc3-483b-ae56-cf23346b97b9
https://github.com/vim/vim/commit/0971c7a4e537ea120a6bb2195960be8d0815e97b

Comment 1 Marian Rehak 2022-06-29 12:42:12 UTC

Created vim tracking bugs for this issue:

Affects: fedora-all [bug 2102186]

Comment 4 Zack Miele 2022-09-22 18:45:44 UTC

PoC does not trigger on rhel-8 version, but does not check if the cursor column is more than zero when in replace mode. PoC triggers asan abort with rhel-9 version.