CVE-2020-14000
Scratch Scratch-vm Untrusted Extension URL Remote Code Execution
Description
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.
INFO
Published Date :
July 16, 2020, 3:15 p.m.
Last Modified :
July 24, 2020, 3:02 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2020-14000 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-14000.
| URL | Resource |
|---|---|
| https://github.com/LLK/scratch-vm/pull/2476 | Third Party Advisory |
| https://scratch.mit.edu/discuss/topic/422904/?page=1#post-4223443 | Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
JavaScript CSS HTML
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-14000 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-14000 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Jul. 24, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://github.com/LLK/scratch-vm/pull/2476 No Types Assigned https://github.com/LLK/scratch-vm/pull/2476 Third Party Advisory Changed Reference Type https://scratch.mit.edu/discuss/topic/422904/?page=1#post-4223443 No Types Assigned https://scratch.mit.edu/discuss/topic/422904/?page=1#post-4223443 Vendor Advisory Added CWE NIST CWE-502 Added CPE Configuration OR *cpe:2.3:a:mit:scratch-vm:*:*:*:*:*:*:*:* versions up to (excluding) 0.2.0-prerelease.20200714185213
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-14000 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-14000
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
4.27 }} 1.08%
score
0.92449
percentile