Bug 2187166 (CVE-2020-17354)

Summary:	CVE-2020-17354 LilyPond: Lilypond allows attackers to bypass the -dsafe protection mechanism
Product:	[Other] Security Response	Reporter:	Avinash Hanwate <ahanwate>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
Target Milestone:	---
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Hardware:	All
OS:	Linux
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Fixed In Version:		Doc Type:	If docs needed, set a value
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Last Closed:	2023-04-17 11:05:04 UTC	Type:	---
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Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
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Bug Depends On:	2187167
Bug Blocks:

Description Avinash Hanwate 2023-04-17 06:33:31 UTC

LilyPond before 2.24 allows attackers to bypass the -dsafe protection mechanism via output-def-lookup or output-def-scope, as demonstrated by dangerous Scheme code in a .ly file that causes arbitrary code execution during conversion to a different file format. NOTE: in 2.24 and later versions, safe mode is removed, and the product no longer tries to block code execution when external files are used.

https://tracker.debian.org/news/1249694/accepted-lilypond-2221-1-source-into-unstable/
https://phabricator.wikimedia.org/T259210
https://www.mediawiki.org/wiki/Extension:Score/2021_security_advisory
https://gitlab.com/lilypond/lilypond/-/merge_requests/1522
http://lilypond.org/doc/v2.18/Documentation/usage/command_002dline-usage
https://lilypond.org/download.html

Comment 1 Avinash Hanwate 2023-04-17 06:33:51 UTC

Created lilypond tracking bugs for this issue:

Affects: fedora-all [bug 2187167]

Comment 2 Product Security DevOps Team 2023-04-17 11:05:02 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.