CVE-2021-32701

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Summary

CVECVE-2021-32701
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-06-22 20:15:00 UTC
Updated2021-06-30 01:10:00 UTC
DescriptionORY Oathkeeper is an Identity & Access Proxy (IAP) and Access Control Decision API that authorizes HTTP requests based on sets of Access Rules. When you make a request to an endpoint that requires the scope `foo` using an access token granted with that `foo` scope, introspection will be valid and that token will be cached. The problem comes when a second requests to an endpoint that requires the scope `bar` is made before the cache has expired. Whether the token is granted or not to the `bar` scope, introspection will be valid. A patch will be released with `v0.38.12-beta.1`. Per default, caching is disabled for the `oauth2_introspection` authenticator. When caching is disabled, this vulnerability does not exist. The cache is checked in [`func (a *AuthenticatorOAuth2Introspection) Authenticate(...)`](https://github.com/ory/oathkeeper/blob/6a31df1c3779425e05db1c2a381166b087cb29a4/pipeline/authn/authenticator_oauth2_introspection.go#L152). From [`tokenFromCache()`](https://github.com/ory/oathkeeper/blob/6a31df1c3779425e05db1c2a381166b087cb29a4/pipeline/authn/authenticator_oauth2_introspection.go#L97) it seems that it only validates the token expiration date, but ignores whether the token has or not the proper scopes. The vulnerability was introduced in PR #424. During review, we failed to require appropriate test coverage by the submitter which is the primary reason that the vulnerability passed the review process.

Risk And Classification

Problem Types: CWE-863

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Ory Oathkeeper 0.38.0 beta2 All All
Application Ory Oathkeeper 0.38.1 beta2 All All
Application Ory Oathkeeper 0.38.10 beta2 All All
Application Ory Oathkeeper 0.38.11 beta1 All All
Application Ory Oathkeeper 0.38.2 beta1 All All
Application Ory Oathkeeper 0.38.3 beta1 All All
Application Ory Oathkeeper 0.38.4 beta1 All All
Application Ory Oathkeeper 0.38.5 beta1 All All
Application Ory Oathkeeper 0.38.6 beta1 All All
Application Ory Oathkeeper 0.38.7 beta1 All All
Application Ory Oathkeeper 0.38.8 beta1 All All
Application Ory Oathkeeper 0.38.9 beta1 All All

References

ReferenceSourceLinkTags
Merge pull request from GHSA-qvp4-rpmr-xwrr · ory/oathkeeper@1f9f625 · GitHub MISC github.com
Possible bypass of token claim validation when OAuth2 Introspection caching is enabled · Advisory · ory/oathkeeper · GitHub CONFIRM github.com
feat: cache incoming oauth introspect tokens by pike1212 · Pull Request #424 · ory/oathkeeper · GitHub MISC github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 982055 Go (go) Security Update for github.com/ory/oathkeeper (GHSA-vfvf-6gx5-mqv6)
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