Vulnerability Details : CVE-2023-6563
Potential exploit
An unconstrained memory consumption vulnerability was discovered in Keycloak. It can be triggered in environments which have millions of offline tokens (> 500,000 users with each having at least 2 saved sessions). If an attacker creates two or more user sessions and then open the "consents" tab of the admin User Interface, the UI attempts to load a huge number of offline client sessions leading to excessive memory and CPU consumption which could potentially crash the entire system.
Products affected by CVE-2023-6563
- cpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openshift_container_platform:4.12:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openshift_container_platform:4.11:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:single_sign-on:-:*:*:*:text-only:*:*:*
- cpe:2.3:a:redhat:single_sign-on:7.6:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openshift_container_platform_for_ibm_linuxone:4.10:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openshift_container_platform_for_ibm_linuxone:4.9:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openshift_container_platform_for_power:4.10:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openshift_container_platform_for_power:4.9:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-6563
1.33%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 79 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-6563
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.7
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
3.1
|
4.0
|
NIST | |
|
7.7
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
3.1
|
4.0
|
Red Hat, Inc. | |
|
7.7
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
N/A
|
N/A
|
RedHat-CVE-2023-6563 |
CWE ids for CVE-2023-6563
-
The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.Assigned by:
- nvd@nist.gov (Primary)
- secalert@redhat.com (Secondary)
References for CVE-2023-6563
-
https://access.redhat.com/security/cve/CVE-2023-6563
CVE-2023-6563- Red Hat Customer PortalVendor Advisory
-
https://access.redhat.com/errata/RHSA-2023:7854
RHSA-2023:7854 - Security Advisory - Red Hat Customer PortalVendor Advisory
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https://access.redhat.com/errata/RHSA-2023:7856
RHSA-2023:7856 - Security Advisory - Red Hat Customer PortalVendor Advisory
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https://access.redhat.com/errata/RHSA-2023:7858
RHSA-2023:7858 - Security Advisory - Red Hat Customer PortalVendor Advisory
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https://access.redhat.com/errata/RHSA-2023:7857
RHSA-2023:7857 - Security Advisory - Red Hat Customer PortalExploit
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https://bugzilla.redhat.com/show_bug.cgi?id=2253308
2253308 – (CVE-2023-6563) CVE-2023-6563 keycloak: offline session token DoSIssue Tracking
-
https://access.redhat.com/errata/RHSA-2023:7855
RHSA-2023:7855 - Security Advisory - Red Hat Customer PortalVendor Advisory
-
https://github.com/keycloak/keycloak/issues/13340
Performance Issues with many offline sessions · Issue #13340 · keycloak/keycloak · GitHubIssue Tracking
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