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CVE-2021-39191
Date: September 2, 2021
mod_auth_openidc is an authentication/authorization module for the Apache 2.x HTTP server that functions as an OpenID Connect Relying Party, authenticating users against an OpenID Connect Provider. In versions prior to 2.4.9.4, the 3rd-party init SSO functionality of mod_auth_openidc was reported to be vulnerable to an open redirect attack by supplying a crafted URL in the "target_link_uri" parameter. A patch in version 2.4.9.4 made it so that the "OIDCRedirectURLsAllowed" setting must be applied to the "target_link_uri" parameter. There are no known workarounds aside from upgrading to a patched version.
Language: C
Severity Score
Related Resources (14)
Severity Score
Weakness Type (CWE)
URL Redirection to Untrusted Site ('Open Redirect')
CWE-601CVSS v3.1
| Base Score: |
|
|---|---|
| Attack Vector (AV): | NETWORK |
| Attack Complexity (AC): | LOW |
| Privileges Required (PR): | NONE |
| User Interaction (UI): | REQUIRED |
| Scope (S): | CHANGED |
| Confidentiality (C): | NONE |
| Integrity (I): | LOW |
| Availability (A): | NONE |
CVSS v2
| Base Score: |
|
|---|---|
| Access Vector (AV): | NETWORK |
| Access Complexity (AC): | MEDIUM |
| Authentication (AU): | NONE |
| Confidentiality (C): | PARTIAL |
| Integrity (I): | PARTIAL |
| Availability (A): | NONE |
| Additional information: |