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CVE-2020-17354

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Date: April 15, 2023

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.

Language: C++

Severity Score

Related Resources (11)

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ST5BLLQ4GDME3SN7UE5OMNE5GZE66X4Y/
https://security-tracker.debian.org/tracker/CVE-2020-17354
http://lilypond.org/doc/v2.18/Documentation/usage/command_002dline-usage
https://gitlab.com/lilypond/lilypond/-/merge_requests/1522
https://lilypond.org/download.html
https://phabricator.wikimedia.org/T259210
https://tracker.debian.org/news/1249694/accepted-lilypond-2221-1-source-into-unstable/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/K43PF6VGFJNNGAPY57BW3VMEFFOSMRLF/
https://www.mediawiki.org/wiki/Extension:Score/2021_security_advisory
https://nvd.nist.gov/vuln/detail/CVE-2020-17354
https://www.mend.io/vulnerability-database/CVE-2020-17354

Severity Score

Weakness Type (CWE)

Incorrect Authorization

CWE-863

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): CHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

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