Cyber Resilience

CVE-2023-6841

Redhat Keycloak

Published
10 September 2024
Modified
01 October 2024
Patch / advisory
View advisory
CVSS Score v3.1 7.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0074 51th percentile
Risk Priority 59 floored blend · peak EPSS

Summary

CVE-2023-6841 is a high-severity Improper Handling of Extra Values (CWE-231) vulnerability in Redhat Keycloak. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked in the top 49% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SI-10 (Information Input Validation) — see the control section below for these in your framework.

EU & UK References

Vulnerability Data

A denial of service vulnerability was found in keycloak where the amount of attributes per object is not limited,an attacker by sending repeated HTTP requests could cause a resource exhaustion when the application send back rows with long attribute values.

CWE(s)
CWE-231NVD-CWE-noinfo

Related Threats

MITRE ATT&CK Enterprise Techniques

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-0091Same product: Redhat Keycloak
CVE-2023-0105Same product: Redhat Keycloak
CVE-2023-6927Same product: Redhat Keycloak
CVE-2025-8419Same product: Redhat Keycloak
CVE-2025-7365Same product: Redhat Keycloak
CVE-2024-7341Same product: Redhat Keycloak
CVE-2025-5416Same product: Redhat Keycloak
CVE-2024-1722Same product: Redhat Keycloak
CVE-2023-4918Same product: Redhat Keycloak
CVE-2026-3047Same product: Redhat Keycloak

Affected Assets

redhat
keycloak
all versions
redhat
single sign-on
7.0

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match

Input validation directly enforces correct handling of the number and format of supplied values, stopping extra values from being accepted or processed.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require robust input validation that prevents improper handling of extra values.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing can detect extra-value handling issues but does not prevent them by itself.

A.8.25 Secure development life cycle partial match
prevents

Secure development lifecycle includes input validation and parameter handling that can prevent extra-value processing flaws.

A.8.26 Application security requirements partial match
prevents

Application security requirements typically mandate strict input validation and parameter count checks.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles encourage robust input handling but do not specifically address extra-value scenarios.

A.8.28 Secure coding partial match
prevents

Secure coding standards directly require validation of the exact number and type of input parameters.

References