Keycloak: offline session token dos
CVSS score
7.7
EPSS probability
%1.2
Risk score
0.1
Published
2 y ago
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Impact on My Inventory
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Vulnerability description
DayBreach CVE AI Research
CVE-2023-6563 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.
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.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2023-6563 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | Red Hat | Red Hat Single Sign-On 7.6 for RHEL 7 | View |
| 2 | Red Hat | Red Hat Single Sign-On 7.6 for RHEL 8 | View |
| 3 | Red Hat | Red Hat Single Sign-On 7.6 for RHEL 9 | View |
| 4 | Red Hat | RHEL-8 based Middleware Containers | View |
| 5 | Red Hat | RHEL-8 based Middleware Containers | View |
| 6 | Red Hat | Single Sign-On 7.6.6 | View |
| 7 | Red Hat | Red Hat Build of Keycloak | View |
| 8 | redhat | keycloak | View |
| 9 | redhat | single sign-on | View |
| 10 | redhat | enterprise linux | View |
| 11 | redhat | enterprise linux | View |
| 12 | redhat | enterprise linux | View |
| 13 | redhat | single sign-on | View |
| 14 | redhat | openshift container platform | View |
| 15 | redhat | openshift container platform | View |
| 16 | redhat | openshift container platform for power | View |
| 17 | redhat | openshift container platform for power | View |
| 18 | redhat | openshift container platform for ibm linuxone | View |
| 19 | redhat | openshift container platform for ibm linuxone | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 7.7 | CVSS V31 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H | NVD |
| 7.7 | CVSS V3_1 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H | CVE CNA |
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises 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.
Attack Vector and Accessibility
Official Sources and Advisories
Similar Vulnerabilities
Get this vulnerability through the API
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curl -H "x-api-key: $DAYBREACH_API_KEY" \ "https://api.daybreach.dev/api/v1/intel/cves/CVE-2023-6563"