Keycloak: potential bypass of brute force protection (CVE-2024-4629)
Published Sources: CVE.org, OSV
What is affected, what to do
A vulnerability was found in Keycloak. This flaw allows attackers to bypass brute force protection by exploiting the timing of login attempts.
Update Red Hat build of Keycloak 22 to version 22.0.12-1, Red Hat build of Keycloak 22 to version 22-17, Red Hat build of Keycloak 22 to version 22-20.
- Affected
- Keycloak
eq 24.0.3..24.0.3 - Red Hat build of Keycloak 22
lt *..22.0.12-1 - Red Hat build of Keycloak 22
lt *..22-17 - Red Hat build of Keycloak 22
lt *..22-20 - Red Hat Single Sign-On 7.6 for RHEL 7
lt *..0:18.0.16-1.redhat_00001.1.el7sso - Red Hat Single Sign-On 7.6 for RHEL 8
lt *..0:18.0.16-1.redhat_00001.1.el8sso - Red Hat Single Sign-On 7.6 for RHEL 9
lt *..0:18.0.16-1.redhat_00001.1.el9sso - Red Hat RHEL-8 based Middleware Containers
lt *..7.6-52
- Keycloak
- Fixed in
- Red Hat build of Keycloak 22
22.0.12-1 - Red Hat build of Keycloak 22
22-17 - Red Hat build of Keycloak 22
22-20 - Red Hat Single Sign-On 7.6 for RHEL 7
0:18.0.16-1.redhat_00001.1.el7sso - Red Hat Single Sign-On 7.6 for RHEL 8
0:18.0.16-1.redhat_00001.1.el8sso - Red Hat Single Sign-On 7.6 for RHEL 9
0:18.0.16-1.redhat_00001.1.el9sso - Red Hat RHEL-8 based Middleware Containers
7.6-52
- Red Hat build of Keycloak 22
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Metrics
6.5
Priority
XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.
Source: NVD, CVSS v3
6.5
CVSS v3
Severity Medium on the scale from 0 to 10.
Source: CVE.org, OSV
0.8 %
EPSS score
Low — model estimates < 1% exploitation likelihood.
Source: FIRST EPSS, percentile 56.2
Show all metrics
- Severity
- Medium
Priority (0–325)
The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?
Read in glossary- 63.91 Methodology
Exploit maturity
An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.
Read in glossary- no public PoC known
XIEM Effective CVSS
XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.
Read in glossary- 6.5 Methodology
CVSS v3
CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.
Read in glossary- 6.5
EPSS score
The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.
Read in glossary- 0.8 %
- Low — model estimates < 1% exploitation likelihood.
EPSS percentile
The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.
Read in glossary- 56.2
- High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
KEV status
The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.
Read in glossary- —
- Published
CWE
CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.
Read in glossary- CWE-837
Detection rules
No NEOSEC detection rule is available for this vulnerability yet.
Classification under NIS2 and CRA
Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.
NIS2
NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.
Read in glossary- Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.
CRA
The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.
Read in glossary- From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
ISO/IEC 27001
ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.
Read in glossary- Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.
Description
A vulnerability was found in Keycloak. This flaw allows attackers to bypass brute force protection by exploiting the timing of login attempts. By initiating multiple login requests simultaneously, attackers can exceed the configured limits for failed attempts before the system locks them out. This timing loophole enables attackers to make more guesses at passwords than intended, potentially compromising account security on affected systems.
Source: NVD (NIST), OSV (Open Source Vulnerabilities), cvelistv5
Affected products
The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.
| Affected versions | Fixed in | ||
|---|---|---|---|
| — | keycloak |
|
|
| Red Hat | Red Hat Build of Keycloak |
|
|
| Red Hat | Red Hat build of Keycloak 22 |
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 8 |
|
|
| Red Hat | Red Hat Single Sign-On 7 |
|
|
| Red Hat | Red Hat Single Sign-On 7.6 for RHEL 7 |
|
|
| Red Hat | Red Hat Single Sign-On 7.6 for RHEL 8 |
|
|
| Red Hat | Red Hat Single Sign-On 7.6 for RHEL 9 |
|
|
| Red Hat | RHEL-8 based Middleware Containers |
|
|
| redhat | build_of_keycloak |
|
|
| redhat | keycloak |
|
|
| redhat | openshift_container_platform |
|
|
| redhat | openshift_container_platform_for_linuxone |
|
|
| redhat | openshift_container_platform_for_power |
|
|
| redhat | openshift_container_platform_ibm_z_systems |
|
|
| redhat | single_sign-on |
|
|
| maven | org.keycloak:keycloak-services |
|
|
Vendors and products
- Red Hat Red Hat Build Of Keycloak
- Red Hat Red Hat Build Of Keycloak 22
- Red Hat Red Hat Jboss Enterprise Application Platform 8
- Red Hat Red Hat Single Sign-on 7
- Red Hat Red Hat Single Sign-on 7.6 For Rhel 7
- Red Hat Red Hat Single Sign-on 7.6 For Rhel 8
- Red Hat Red Hat Single Sign-on 7.6 For Rhel 9
- Red Hat Rhel-8 Based Middleware Containers
- Red Hat Red Hat Build of Keycloak
- Red Hat Keycloak
- Red Hat Openshift
- Red Hat Openshift Container Platform For Linuxone
Weakness classes (CWE)
CWE-837Improper Enforcement of a Single, Unique Action
Base
The product requires that an actor should only be able to perform an action once, or to have only one unique action, but the product does not enforce or improperly enforces this restriction.
Entry at MITRE CWE-837
References & sources
- github.comkeycloak/keycloak/security/advisories/GHSA-gc7q-jgjv-vjr2web
- NVD (NIST)vuln/detail/CVE-2024-4629advisory
- github.comkeycloak/keycloak/commit/d78b3072ffffbff3954bf9f3181e3daf8e93c1…web
- github.comkeycloak/keycloak/commit/c8053dd812d9b9f05b293f901b9dc39e061ebb…web
- github.comkeycloak/keycloak/commit/b25c28458a562abda2f84fc684e59cce8577e5…web
- github.comkeycloak/keycloak/commit/99f92ad5fff5555d53930c2d32f8be3e08c514…web
- github.comkeycloak/keycloak/commit/461fa631dc55b9739c9ed8c49de9f5b2139552…web
- github.comkeycloak/keycloak/commit/2fb358e1a21c5387cdc11100ce3562b4dcfe54…web
- github.comkeycloak/keycloakpackage
- bugzilla.redhat.comRHBZ#2276761web, Issue tracking, x_refsource_REDHAT, Issue tracking, Vendor advisory
- access.redhat.comsecurity/cve/CVE-2024-4629web, Vulnerability database, x_refsource_REDHAT, Vendor advisory
- access.redhat.comRHSA-2024:6501web, Vendor advisory, x_refsource_REDHAT, Vendor advisory
- access.redhat.comRHSA-2024:6500web, Vendor advisory, x_refsource_REDHAT, Vendor advisory
- access.redhat.comRHSA-2024:6499web, Vendor advisory, x_refsource_REDHAT, Vendor advisory
- access.redhat.comRHSA-2024:6497web, Vendor advisory, x_refsource_REDHAT, Vendor advisory
- access.redhat.comRHSA-2024:6495web, Vendor advisory, x_refsource_REDHAT, Vendor advisory
- access.redhat.comRHSA-2024:6494web, Vendor advisory, x_refsource_REDHAT, Vendor advisory
- access.redhat.comRHSA-2024:6493web, Vendor advisory, x_refsource_REDHAT, Vendor advisory
- github.comhnsecurity/vulns/blob/main/HNS-2024-09-Keycloak.mdweb
- security.humanativaspa.itan-analysis-of-the-keycloak-authentication-systemweb
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<a href="https://intel.neosec.eu/en/cve/CVE-2024-4629"><img src="https://intel.neosec.eu/badge/cve/CVE-2024-4629.svg?lang=en" alt="CVE-2024-4629 – NEOSEC Intel" height="20"></a>