Bug 2119864 (CVE-2022-2889)

Summary:	CVE-2022-2889 vim: use-after-free in find_var_also_in_script() in evalvars.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:	gchamoul, jburrell, karsten, zdohnal
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	vim 9.0.0225	Doc Type:	If docs needed, set a value
Doc Text:	A use-after-free vulnerability was found in Vim in the find_var_also_in_script function in the evalvars.c file. This issue occurs because an already freed memory is used when a specially crafted input is processed. This flaw allows an attacker who can trick a user into opening a specially crafted file into triggering the use-after-free, causing the 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:	2119866, 2121748
Bug Blocks:	2119865

Description Guilherme de Almeida Suckevicz 2022-08-19 17:21:42 UTC

Use After Free in GitHub repository vim/vim prior to 9.0.0225.

Reference:
https://huntr.dev/bounties/d1ac9817-825d-49ce-b514-1d5b12b6bdaa

Upstream patch:
https://github.com/vim/vim/commit/91c7cbfe31bbef57d5fcf7d76989fc159f73ef15

Comment 1 Guilherme de Almeida Suckevicz 2022-08-19 17:22:53 UTC

Created vim tracking bugs for this issue:

Affects: fedora-all [bug 2119866]