CVE-2020-17354

Public Exploit

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.

Category

8.6
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.02%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory gitlab.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://lilypond.org/doc/v2.18/Documentation/usage/command_002dline-usage release notes
https://phabricator.wikimedia.org/T259210 third party advisory exploit
https://www.mediawiki.org/wiki/Extension:Score/2021_security_advisory third party advisory
https://tracker.debian.org/news/1249694/accepted-lilypond-2221-1-source-into-unstable/ mailing list third party advisory release notes
https://gitlab.com/lilypond/lilypond/-/merge_requests/1522 patch vendor advisory
https://lilypond.org/download.html product
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ST5BLLQ4GDME3SN7UE5OMNE5GZE66X4Y/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K43PF6VGFJNNGAPY57BW3VMEFFOSMRLF/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-17354?
CVE-2020-17354 has been scored as a high severity vulnerability.
How to fix CVE-2020-17354?
To fix CVE-2020-17354, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-17354 being actively exploited in the wild?
It is possible that CVE-2020-17354 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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