keycloak-core: open redirect via "form_post.jwt" JARM response mode
An incomplete fix was found in Keycloak Core patch. An attacker can steal authorization codes or tokens from clients using a wildcard in the JARM response mode "form_post.jwt". It is observed that changing the response_mode parameter in the original proof of concept from "form_post" to "form_post.jwt" can bypass the security patch implemented to address CVE-2023-6134.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2023-6927US | medium6.1 | — | ||
A flaw was found in Keycloak. This issue may allow an attacker to steal authorization codes or tokens from clients using a wildcard in the JARM response mode "form_post.jwt" which… | ||||
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references
External citations — patches, advisories, analysis.
- https://access.redhat.com/errata/RHSA-2024:0094WEB
- https://access.redhat.com/errata/RHSA-2024:0095WEB
- https://access.redhat.com/errata/RHSA-2024:0096WEB
- https://access.redhat.com/errata/RHSA-2024:0097WEB
- https://access.redhat.com/errata/RHSA-2024:0098WEB
- https://access.redhat.com/errata/RHSA-2024:0100WEB
- https://access.redhat.com/errata/RHSA-2024:0101WEB
- https://access.redhat.com/security/cve/CVE-2023-6927WEB
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