5.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
5.5 Medium
AI Score
Confidence
High
5.5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:S/C:P/I:P/A:N
0.001 Low
EPSS
Percentile
44.1%
OAuth2-Proxy is an open source reverse proxy that provides authentication with Google, Github or other providers. The --gitlab-group
flag for group-based authorization in the GitLab provider stopped working in the v7.0.0 release. Regardless of the flag settings, authorization wasnβt restricted. Additionally, any authenticated users had whichever groups were set in --gitlab-group
added to the new X-Forwarded-Groups
header to the upstream application. While adding GitLab project based authorization support in #630, a bug was introduced where the user sessionβs groups field was populated with the --gitlab-group
config entries instead of pulling the individual userβs group membership from the GitLab Userinfo endpoint. When the session groups where compared against the allowed groups for authorization, they matched improperly (since both lists were populated with the same data) so authorization was allowed. This impacts GitLab Provider users who relies on group membership for authorization restrictions. Any authenticated users in your GitLab environment can access your applications regardless of --gitlab-group
membership restrictions. This is patched in v7.1.0. There is no workaround for the Group membership bug. But --gitlab-project
can be set to use Project membership as the authorization checks instead of groups; it is not broken.
CPE | Name | Operator | Version |
---|---|---|---|
oauth2_proxy_project:oauth2_proxy | oauth2 proxy project oauth2 proxy | lt | 7.1.0 |
More
5.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
5.5 Medium
AI Score
Confidence
High
5.5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:S/C:P/I:P/A:N
0.001 Low
EPSS
Percentile
44.1%