CVE-2021-29437

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Summary

CVECVE-2021-29437
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-04-13 20:15:00 UTC
Updated2023-06-26 19:10:00 UTC
DescriptionScratchOAuth2 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.

Risk And Classification

Problem Types: NVD-CWE-noinfo

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Scratchoauth2 Project Scratchoauth2 All All All All

References

ReferenceSourceLinkTags
SECURITY: Mitigate MITM (GHSA-gvpg-23fh-8g75) · ScratchVerifier/ScratchOAuth2@9220c2a · GitHub MISC github.com
Account compromise by man-in-the-middle attack · Advisory · ScratchVerifier/ScratchOAuth2 · GitHub CONFIRM github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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