CVE-2021-21291

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Summary

CVECVE-2021-21291
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-02-02 19:15:00 UTC
Updated2021-02-08 16:36:00 UTC
DescriptionOAuth2 Proxy is an open-source reverse proxy and static file server that provides authentication using Providers (Google, GitHub, and others) to validate accounts by email, domain or group. In OAuth2 Proxy before version 7.0.0, for users that use the whitelist domain feature, a domain that ended in a similar way to the intended domain could have been allowed as a redirect. For example, if a whitelist domain was configured for ".example.com", the intention is that subdomains of example.com are allowed. Instead, "example.com" and "badexample.com" could also match. This is fixed in version 7.0.0 onwards. As a workaround, one can disable the whitelist domain feature and run separate OAuth2 Proxy instances for each subdomain.

Risk And Classification

Problem Types: CWE-601

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Oauth2 Proxy Project Oauth2 Proxy All All All All
Application Oauth2 Proxy Project Oauth2 Proxy All All All All

References

ReferenceSourceLinkTags
Release v7.0.0 · oauth2-proxy/oauth2-proxy · GitHub MISC github.com Release Notes, Third Party Advisory
Merge pull request from GHSA-4mf2-f3wh-gvf2 · oauth2-proxy/oauth2-proxy@780ae4f · GitHub MISC github.com Patch, Third Party Advisory
Subdomain checking of whitelisted domains could allow unintended redirects · Advisory · oauth2-proxy/oauth2-proxy · GitHub CONFIRM github.com Exploit, Third Party Advisory
oauth2-proxy · pkg.go.dev MISC pkg.go.dev Product, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 690367 Free Berkeley Software Distribution (FreeBSD) Security Update for oauth2-proxy (3003ba60-6cec-11eb-8815-040e3c1b8a02)
  • 982401 Go (go) Security Update for github.com/oauth2-proxy/oauth2-proxy (GHSA-4mf2-f3wh-gvf2)
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