CVE-2021-32701 – github.com/ory/oathkeeper

Package

Manager: go
Name: github.com/ory/oathkeeper
Vulnerable Version: >=0.38.0-beta.2 <0.38.12-beta.1

Severity

Level: High

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

EPSS: 0.00308 pctl0.53434

Details

Incorrect Authorization in ORY Oathkeeper 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.

Metadata

Created: 2021-06-24T20:16:02Z
Modified: 2021-06-23T20:38:29Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/06/GHSA-vfvf-6gx5-mqv6/GHSA-vfvf-6gx5-mqv6.json
CWE IDs: ["CWE-863"]
Alternative ID: GHSA-vfvf-6gx5-mqv6
Finding: F006
Auto approve: 1