QID 980744

QID 980744: Nodejs (npm) Security Update for scratch-vm (GHSA-vc9j-fhvv-8vrf)

MIT Lifelong Kindergarten Scratch scratch-vm before 0.2.0-prerelease.20200714185213 loads extension URLs from untrusted project.json files with certain _ characters, resulting in remote code execution because the URL's content is treated as a script and is executed as a worker. The responsible code is getExtensionIdForOpcode in serialization/sb3.js. The use of _ is incompatible with a protection mechanism in older versions, in which URLs were split and consequently deserialization attacks were prevented.
NOTE: the scratch.mit.edu hosted service is not affected because of the lack of worker scripts.

Successful exploitation of this vulnerability may affect the confidentiality, integrity, and availability of the targeted user.

CVSS V3 rated as Critical - 9.8 severity.

CVSS V2 rated as High - 7.5 severity.

Solution

Customers are advised to refer to GHSA-vc9j-fhvv-8vrf for updates pertaining to this vulnerability.

Vendor References

GHSA-vc9j-fhvv-8vrf - github.com/advisories/GHSA-vc9j-fhvv-8vrf

CVEs related to QID 980744

CVE-2020-14000 |

Software Advisories

Advisory ID	Software	Component	Link
GHSA-vc9j-fhvv-8vrf	scratch-vm		github.com/advisories/GHSA-vc9j-fhvv-8vrf

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