CVE-2020-17354

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.

CVSS v3.1 NVD

8.6 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

EPSS

0.41% chance of exploitation in the next 30 days, 34th percentile

Published

2023-04-15

Updated

2025-02-06

Proof-of-concept exploits (1)

• https://phabricator.wikimedia.org/T259210

Security advisories

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

References

• CVE Record
• NVD entry