CVE-2020-17354

HIGH

LilyPond < 2.24.0 - Unauthenticated Arbitrary Code Execution via Scheme Code in .ly File

Title source: llm

Description

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.

References (8)

Core 8

Core References

Mailing List, Third Party Advisory vendor-advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ST5BLLQ4GDME3SN7UE5OMNE5GZE66X4Y/

Mailing List, Third Party Advisory vendor-advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K43PF6VGFJNNGAPY57BW3VMEFFOSMRLF/

Release Notes

http://lilypond.org/doc/v2.18/Documentation/usage/command_002dline-usage

Patch, Vendor Advisory

https://gitlab.com/lilypond/lilypond/-/merge_requests/1522

Product

https://lilypond.org/download.html

Exploit, Third Party Advisory

https://phabricator.wikimedia.org/T259210

Mailing List, Release Notes, Third Party Advisory

https://tracker.debian.org/news/1249694/accepted-lilypond-2221-1-source-into-unstable/

Third Party Advisory

https://www.mediawiki.org/wiki/Extension:Score/2021_security_advisory

Scores

CVSS v3 8.6

EPSS 0.0041

EPSS Percentile 33.1%

Attack Vector LOCAL

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

CISA SSVC

Vulnrichment

Exploitation poc

Automatable no

Technical Impact total

Details

CWE

CWE-863

Status published

Products (1)

lilypond/lilypond < 2.24.0

Published Apr 15, 2023

Tracked Since Feb 18, 2026