A vulnerability was found in Score Extension up to 0.3.0 on MediaWiki. It has been declared as critical. Affected by this vulnerability is some unknown functionality of the component GNU LilyPond. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The Score extension through 0.3.0 for MediaWiki has a remote code execution vulnerability due to improper sandboxing of the GNU LilyPond executable. This allows any user with an ability to edit articles (potentially including unauthenticated anonymous users) to execute arbitrary Scheme or shell code by using crafted {{Image data to generate musical scores containing malicious code.

The weakness was presented 04/16/2023. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2020-29007 since 11/24/2020. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/05/2023). The attack technique deployed by this issue is T1059 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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• Score Extension

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• 0.1
• 0.2
• 0.3

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CPE 2.2info

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