Medium severity · published Apr 25, 2024
CVE-2023-6544
Keycloak: authorization bypass
5.4
CVSS
1.1%
EPSS
No
On KEV
Description
A flaw was found in the Keycloak package. This issue occurs due to a permissive regular expression hardcoded for filtering which allows hosts to register a dynamic client. A malicious user with enough information about the environment could jeopardize an environment with this specific Dynamic Client Registration and TrustedDomain configuration previously unauthorized.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 65% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RB
RHEL-8 based Middleware Containers · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Single Sign-On 7.6 for RHEL 7 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Single Sign-On 7.6 for RHEL 8 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Single Sign-On 7.6 for RHEL 9 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat build of Keycloak 22 · Red Hat
All versions, or not specified · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-6544
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-6544
access.redhat.com
https://access.redhat.com/errata/RHSA-2024:1860
access.redhat.com
https://access.redhat.com/errata/RHSA-2024:1861
access.redhat.com
https://access.redhat.com/errata/RHSA-2024:1862
access.redhat.com
https://access.redhat.com/errata/RHSA-2024:1864
access.redhat.com
https://access.redhat.com/errata/RHSA-2024:1866
access.redhat.com
https://access.redhat.com/errata/RHSA-2024:1867
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