CVE-2020-17353 : Security Advisory and Response

LilyPond through version 2.20.0 and 2.21.x through 2.21.4 is affected by a vulnerability in scm/define-stencil-commands.scm. When using -dsafe, it lacks restrictions on embedded-ps and embedded-svg, allowing the inclusion of dangerous PostScript code.

Understanding CVE-2020-17353

This CVE identifies a security issue in LilyPond software versions.

What is CVE-2020-17353?

This CVE pertains to a vulnerability in LilyPond that allows the inclusion of hazardous PostScript code when certain conditions are met.

The Impact of CVE-2020-17353

The vulnerability can be exploited to execute malicious PostScript code, potentially leading to unauthorized actions on the affected system.

Technical Details of CVE-2020-17353

LilyPond software is susceptible to a specific security flaw.

Vulnerability Description

The issue arises from the lack of restrictions on embedded-ps and embedded-svg when using -dsafe in scm/define-stencil-commands.scm.

Affected Systems and Versions

LilyPond through version 2.20.0
LilyPond 2.21.x through 2.21.4

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting dangerous PostScript code into the affected software.

Mitigation and Prevention

Steps to address and prevent the exploitation of CVE-2020-17353.

Immediate Steps to Take

Avoid using the -dsafe option in LilyPond until a patch is available.
Regularly monitor for security advisories and updates from LilyPond.

Long-Term Security Practices

Implement secure coding practices to prevent code injection vulnerabilities.
Conduct regular security assessments and code reviews to identify and mitigate similar issues.

Patching and Updates

Apply patches or updates provided by LilyPond to address the vulnerability.