Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Lilypond | Lilypond | < 2.24.0 |
Related Weaknesses (CWE)
References
- http://lilypond.org/doc/v2.18/Documentation/usage/command_002dline-usageRelease Notes
- https://gitlab.com/lilypond/lilypond/-/merge_requests/1522PatchVendor Advisory
- https://lilypond.org/download.htmlProduct
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://phabricator.wikimedia.org/T259210ExploitThird Party Advisory
- https://tracker.debian.org/news/1249694/accepted-lilypond-2221-1-source-into-unsMailing ListRelease NotesThird Party Advisory
- https://www.mediawiki.org/wiki/Extension:Score/2021_security_advisoryThird Party Advisory
- http://lilypond.org/doc/v2.18/Documentation/usage/command_002dline-usageRelease Notes
- https://gitlab.com/lilypond/lilypond/-/merge_requests/1522PatchVendor Advisory
- https://lilypond.org/download.htmlProduct
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://phabricator.wikimedia.org/T259210ExploitThird Party Advisory
- https://tracker.debian.org/news/1249694/accepted-lilypond-2221-1-source-into-unsMailing ListRelease NotesThird Party Advisory
FAQ
What is CVE-2020-17354?
CVE-2020-17354 is a vulnerability with a CVSS score of 8.6 (HIGH). 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 ...
How severe is CVE-2020-17354?
CVE-2020-17354 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-17354?
Check the references section above for vendor advisories and patch information. Affected products include: Lilypond Lilypond.