Auth bypass in Lilypond
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.
Vulnerability class: Broken Access Control
EPSS: 0.004 (34.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.
Affected products
- Lilypond
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Release Notes)
- cve@mitre.org (Exploit, Third Party Advisory)
- cve@mitre.org (Third Party Advisory)
- cve@mitre.org (Mailing List, Third Party Advisory, Release Notes)
- cve@mitre.org (Patch, Vendor Advisory)
- cve@mitre.org (Product)
- cve@mitre.org (vendor-advisory)
- cve@mitre.org (vendor-advisory)
Frequently asked questions
- What is CVE-2020-17354?
- CVE-2020-17354 is a high-severity vulnerability in Lilypond, classified under Incorrect Authorization. CVSS score: 8.6/10. Published 2023-04-15.
- How severe is CVE-2020-17354?
- High severity. CVSS v3 base score is 8.6 out of 10.