CVE-2021-32701

ORY 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.
Configurations

Configuration 1

cpe:2.3:a:ory:oathkeeper:0.38.1:beta2:*:*:*:*:*:*
cpe:2.3:a:ory:oathkeeper:0.38.2:beta1:*:*:*:*:*:*
cpe:2.3:a:ory:oathkeeper:0.38.3:beta1:*:*:*:*:*:*
cpe:2.3:a:ory:oathkeeper:0.38.4:beta1:*:*:*:*:*:*
cpe:2.3:a:ory:oathkeeper:0.38.5:beta1:*:*:*:*:*:*
cpe:2.3:a:ory:oathkeeper:0.38.6:beta1:*:*:*:*:*:*
cpe:2.3:a:ory:oathkeeper:0.38.7:beta1:*:*:*:*:*:*
cpe:2.3:a:ory:oathkeeper:0.38.8:beta1:*:*:*:*:*:*
cpe:2.3:a:ory:oathkeeper:0.38.9:beta1:*:*:*:*:*:*
cpe:2.3:a:ory:oathkeeper:0.38.10:beta2:*:*:*:*:*:*
cpe:2.3:a:ory:oathkeeper:0.38.11:beta1:*:*:*:*:*:*
cpe:2.3:a:ory:oathkeeper:0.38.0:beta2:*:*:*:*:*:*

Information

Published : 2021-06-22 08:15

Updated : 2021-06-30 01:10


NVD link : CVE-2021-32701

Mitre link : CVE-2021-32701

Products Affected
No products.
CWE