CVE-2023-6563
Keycloak Memory Exhaustion DoS Vulnerability
Description
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.
INFO
Published Date :
Dec. 14, 2023, 6:15 p.m.
Last Modified :
Dec. 27, 2023, 6:49 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
4.0
Exploitability Score :
3.1
Affected Products
The following products are affected by CVE-2023-6563
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2023-6563.
| URL | Resource |
|---|---|
| https://access.redhat.com/errata/RHSA-2023:7854 | Vendor Advisory |
| https://access.redhat.com/errata/RHSA-2023:7855 | Vendor Advisory |
| https://access.redhat.com/errata/RHSA-2023:7856 | Vendor Advisory |
| https://access.redhat.com/errata/RHSA-2023:7857 | Exploit |
| https://access.redhat.com/errata/RHSA-2023:7858 | Vendor Advisory |
| https://access.redhat.com/security/cve/CVE-2023-6563 | Vendor Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=2253308 | Issue Tracking |
| https://github.com/keycloak/keycloak/issues/13340 | Issue Tracking |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-6563 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-6563 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Dec. 27, 2023
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H Changed Reference Type https://access.redhat.com/errata/RHSA-2023:7854 No Types Assigned https://access.redhat.com/errata/RHSA-2023:7854 Vendor Advisory Changed Reference Type https://access.redhat.com/errata/RHSA-2023:7855 No Types Assigned https://access.redhat.com/errata/RHSA-2023:7855 Vendor Advisory Changed Reference Type https://access.redhat.com/errata/RHSA-2023:7856 No Types Assigned https://access.redhat.com/errata/RHSA-2023:7856 Vendor Advisory Changed Reference Type https://access.redhat.com/errata/RHSA-2023:7857 No Types Assigned https://access.redhat.com/errata/RHSA-2023:7857 Exploit Changed Reference Type https://access.redhat.com/errata/RHSA-2023:7858 No Types Assigned https://access.redhat.com/errata/RHSA-2023:7858 Vendor Advisory Changed Reference Type https://access.redhat.com/security/cve/CVE-2023-6563 No Types Assigned https://access.redhat.com/security/cve/CVE-2023-6563 Vendor Advisory Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=2253308 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=2253308 Issue Tracking Changed Reference Type https://github.com/keycloak/keycloak/issues/13340 No Types Assigned https://github.com/keycloak/keycloak/issues/13340 Issue Tracking Added CWE NIST CWE-770 Added CPE Configuration OR *cpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:* versions up to (excluding) 21.0.0 Added CPE Configuration AND OR *cpe:2.3:a:redhat:single_sign-on:7.6:*:*:*:*:*:*:* OR cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:redhat:single_sign-on:-:*:*:*:text-only:*:*:* Added CPE Configuration AND OR *cpe:2.3:a:redhat:openshift_container_platform:4.11:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openshift_container_platform:4.12:*:*:*:*:*:*:* OR cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:a:redhat:openshift_container_platform_for_power:4.9:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openshift_container_platform_for_power:4.10:*:*:*:*:*:*:* OR cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:a:redhat:openshift_container_platform_for_ibm_linuxone:4.9:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openshift_container_platform_for_ibm_linuxone:4.10:*:*:*:*:*:*:* OR cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Dec. 14, 2023
Action Type Old Value New Value Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2023:7854 [No types assigned] Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2023:7855 [No types assigned] Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2023:7856 [No types assigned] Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2023:7857 [No types assigned] Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2023:7858 [No types assigned] -
CVE Received by [email protected]
Dec. 14, 2023
Action Type Old Value New Value Added Description 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. Added Reference Red Hat, Inc. https://access.redhat.com/security/cve/CVE-2023-6563 [No types assigned] Added Reference Red Hat, Inc. https://bugzilla.redhat.com/show_bug.cgi?id=2253308 [No types assigned] Added Reference Red Hat, Inc. https://github.com/keycloak/keycloak/issues/13340 [No types assigned] Added CWE Red Hat, Inc. CWE-770 Added CVSS V3.1 Red Hat, Inc. AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-6563 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-6563
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.09 }} 0.05%
score
0.38802
percentile