Bug 2112794 (CVE-2021-41556)

Summary:	CVE-2021-41556 squirrel: out-of-bounds read in core interpreter allows sandbox escape leads to code execution
Product:	[Other] Security Response	Reporter:	TEJ RATHI <trathi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	amigadave, dan, steve
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	squirrel 3.2	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-08-30 22:25:52 UTC	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:	2112796, 2112797, 2112798
Bug Blocks:	2112599

Description TEJ RATHI 2022-08-01 07:29:54 UTC

sqclass.cpp in Squirrel through 2.2.5 and 3.x through 3.1 allows an out-of-bounds read (in the core interpreter) that can lead to Code Execution. If a victim executes an attacker-controlled squirrel script, it is possible for the attacker to break out of the squirrel script sandbox even if all dangerous functionality such as File System functions has been disabled. An attacker might abuse this bug to target (for example) Cloud services that allow customization via SquirrelScripts, or distribute malware through video games that embed a Squirrel Engine.

http://www.squirrel-lang.org/#download
https://github.com/albertodemichelis/squirrel/commit/23a0620658714b996d20da3d4dd1a0dcf9b0bd98
https://blog.sonarsource.com/squirrel-vm-sandbox-escape/

Comment 1 TEJ RATHI 2022-08-01 07:30:32 UTC

Created squirrel tracking bugs for this issue:

Affects: epel-all [bug 2112796]
Affects: fedora-all [bug 2112797]


Created supertux tracking bugs for this issue:

Affects: fedora-all [bug 2112798]

Comment 2 Product Security DevOps Team 2022-08-30 22:25:50 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.