Executive Summary
Informations | |||
---|---|---|---|
Name | CVE-2021-29437 | First vendor Publication | 2021-04-13 |
Vendor | Cve | Last vendor Modification | 2023-06-26 |
Security-Database Scoring CVSS v3
Cvss vector : CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N | |||
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Overall CVSS Score | 6.8 | ||
Base Score | 6.8 | Environmental Score | 6.8 |
impact SubScore | 5.2 | Temporal Score | 6.8 |
Exploitabality Sub Score | 1.6 | ||
Attack Vector | Network | Attack Complexity | High |
Privileges Required | None | User Interaction | Required |
Scope | Unchanged | Confidentiality Impact | High |
Integrity Impact | High | Availability Impact | None |
Calculate full CVSS 3.0 Vectors scores |
Security-Database Scoring CVSS v2
Cvss vector : (AV:N/AC:H/Au:N/C:P/I:P/A:N) | |||
---|---|---|---|
Cvss Base Score | 4 | Attack Range | Network |
Cvss Impact Score | 4.9 | Attack Complexity | High |
Cvss Expoit Score | 4.9 | Authentication | None Required |
Calculate full CVSS 2.0 Vectors scores |
Detail
ScratchOAuth2 is an Oauth implementation for Scratch. Any ScratchOAuth2-related data normally accessible and modifiable by a user can be read and modified by a third party. 1. Scratch user visits 3rd party site. 2. 3rd party site asks user for Scratch username. 3. 3rd party site pretends to be user and gets login code from ScratchOAuth2. 4. 3rd party site gives code to user and instructs them to post it on their profile. 5. User posts code on their profile, not knowing it is a ScratchOAuth2 login code. 6. 3rd party site completes login with ScratchOAuth2. 7. 3rd party site has full access to anything the user could do if they directly logged in. See referenced GitHub security advisory for patch notes and workarounds. |
Original Source
Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29437 |
CPE : Common Platform Enumeration
Type | Description | Count |
---|---|---|
Application | 1 |
Sources (Detail)
Source | Url |
---|---|
CONFIRM | https://github.com/ScratchVerifier/ScratchOAuth2/security/advisories/GHSA-gvp... |
MISC | https://github.com/ScratchVerifier/ScratchOAuth2/commit/9220c2a77eda3df37a844... |
Alert History
Date | Informations |
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2023-06-27 00:27:36 |
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2021-05-04 14:10:05 |
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2021-04-22 21:23:08 |
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2021-04-14 05:23:04 |
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