MediumCVE-2023-6484

    Keycloak: log injection during webauthn authentication or registration (CVE-2023-6484)

    Published Sources: OSV, CVE.org

    What is affected, what to do

    A log injection flaw was found in Keycloak. A text string may be injected through the authentication form when using the WebAuthn authentication mode.

    Update Keycloak to version 22.0.9, Keycloak to version 23.0.5, Red Hat build of Keycloak 22 to version 22.0.10-1.

    Affected
    • Keycloak lt *..22.0.9
    • Keycloak lt 23.0.0..23.0.5
    • Red Hat build of Keycloak 22 lt *..22.0.10-1
    • Red Hat build of Keycloak 22 lt *..22-13
    • Red Hat build of Keycloak 22 lt *..22-16
    • Red Hat Single Sign-On 7.6 for RHEL 7 lt *..0:18.0.12-1.redhat_00001.1.el7sso
    • Red Hat Single Sign-On 7.6 for RHEL 7 lt *..0:18.0.13-1.redhat_00001.1.el7sso
    • Red Hat Single Sign-On 7.6 for RHEL 8 lt *..0:18.0.12-1.redhat_00001.1.el8sso
    • Red Hat Single Sign-On 7.6 for RHEL 8 lt *..0:18.0.13-1.redhat_00001.1.el8sso
    • Red Hat Single Sign-On 7.6 for RHEL 9 lt *..0:18.0.12-1.redhat_00001.1.el9sso
    • Red Hat Single Sign-On 7.6 for RHEL 9 lt *..0:18.0.13-1.redhat_00001.1.el9sso
    • Red Hat RHEL-8 based Middleware Containers lt *..7.6-41
    • Red Hat RHEL-8 based Middleware Containers lt *..7.6-46
    • Red Hat RHEL-8 based Middleware Containers lt *..7.6-16
    • Red Hat RHEL-8 based Middleware Containers lt *..7.6-18
    • Red Hat RHEL-8 based Middleware Containers lt *..7.6.8-2
    Fixed in
    • Keycloak 22.0.9
    • Keycloak 23.0.5
    • Red Hat build of Keycloak 22 22.0.10-1
    • Red Hat build of Keycloak 22 22-13
    • Red Hat build of Keycloak 22 22-16
    • Red Hat Single Sign-On 7.6 for RHEL 7 0:18.0.12-1.redhat_00001.1.el7sso
    • Red Hat Single Sign-On 7.6 for RHEL 7 0:18.0.13-1.redhat_00001.1.el7sso
    • Red Hat Single Sign-On 7.6 for RHEL 8 0:18.0.12-1.redhat_00001.1.el8sso
    • Red Hat Single Sign-On 7.6 for RHEL 8 0:18.0.13-1.redhat_00001.1.el8sso
    • Red Hat Single Sign-On 7.6 for RHEL 9 0:18.0.12-1.redhat_00001.1.el9sso
    • Red Hat Single Sign-On 7.6 for RHEL 9 0:18.0.13-1.redhat_00001.1.el9sso
    • Red Hat RHEL-8 based Middleware Containers 7.6-41
    • Red Hat RHEL-8 based Middleware Containers 7.6-46
    • Red Hat RHEL-8 based Middleware Containers 7.6-16
    • Red Hat RHEL-8 based Middleware Containers 7.6-18
    • Red Hat RHEL-8 based Middleware Containers 7.6.8-2

    Not sure whether and how you are affected? Ask a question about this vulnerability

    Metrics

    5.3

    Priority

    XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

    Source: NVD, CVSS v3

    5.3

    CVSS v3

    Severity Medium on the scale from 0 to 10.

    Source: OSV, CVE.org

    1.0 %

    EPSS score

    Moderate — model estimates 1-10% exploitation likelihood.

    Source: FIRST EPSS, percentile 62.9

    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
    63.18 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
    5.3 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
    5.3
    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
    1.0 %
    Moderate — model estimates 1-10% 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
    62.9
    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-117

    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 log injection flaw was found in Keycloak. A text string may be injected through the authentication form when using the WebAuthn authentication mode. This issue may have a minor impact to the logs integrity.

    Source: OSV (Open Source Vulnerabilities), cvelistv5, NVD (NIST)

    Affected products

    The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

    Affected products
    Affected versionsFixed in
    —keycloak
    • < 22.0.9
    • 23.0.0 – < 23.0.5
    • 22.0.9
    • 23.0.5
    Red HatRed Hat build of Keycloak 22
    • < 22-13
    • < 22-16
    • < 22.0.10-1
    • 22-13
    • 22-16
    • 22.0.10-1
    Red HatRed Hat build of Keycloak 22.0.10
    • —
    • —
    Red HatRed Hat Single Sign-On 7
    • —
    • —
    Red HatRed Hat Single Sign-On 7.6 for RHEL 7
    • < 0:18.0.13-1.redhat_00001.1.el7sso
    • < 0:18.0.12-1.redhat_00001.1.el7sso
    • 0:18.0.13-1.redhat_00001.1.el7sso
    • 0:18.0.12-1.redhat_00001.1.el7sso
    Red HatRed Hat Single Sign-On 7.6 for RHEL 8
    • < 0:18.0.12-1.redhat_00001.1.el8sso
    • < 0:18.0.13-1.redhat_00001.1.el8sso
    • 0:18.0.12-1.redhat_00001.1.el8sso
    • 0:18.0.13-1.redhat_00001.1.el8sso
    Red HatRed Hat Single Sign-On 7.6 for RHEL 9
    • < 0:18.0.13-1.redhat_00001.1.el9sso
    • < 0:18.0.12-1.redhat_00001.1.el9sso
    • 0:18.0.13-1.redhat_00001.1.el9sso
    • 0:18.0.12-1.redhat_00001.1.el9sso
    Red HatRHEL-8 based Middleware Containers
    • < 7.6-46
    • < 7.6-18
    • < 7.6-41
    • < 7.6.8-2
    • < 7.6-16
    • 7.6-46
    • 7.6-18
    • 7.6-41
    • 7.6.8-2
    • 7.6-16
    Red HatRHSSO 7.6.8
    • —
    • —
    mavenorg.keycloak:keycloak-services
    • 8.0.1
    • 8.0.2
    • 2.5.5.Final
    • 13.0.0
    • 21.1.1
    • 4.3.0.Final
    • 15.0.1
    • 2.2.1.Final
    • 1.9.5.Final
    • 2.4.0.CR1
    • 1.0-rc-2
    • 12.0.4
    • 1.9.8.Final
    • 3.4.2.Final
    • 1.0-beta-4
    • 1.0-alpha-2
    • 1.2.0.CR1
    • 22.0.4
    • 1.0.5.Final
    • 3.0.0.Final
    • 10.0.2
    • 1.7.0.Final
    • 3.4.0.Final
    • 16.1.0
    • 10.0.0
    • 1.0.4.Final
    • 12.0.2
    • 1.3.0.Final
    • 1.9.0.CR1
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —
    • —

    Vendors and products

    Weakness classes (CWE)

    • CWE-117Improper Output Neutralization for Logs

      Base

      The product constructs a log message from external input, but it does not neutralize or incorrectly neutralizes special elements when the message is written to a log file.

      Entry at MITRE CWE-117

    References & sources

    Embed badge

    Show the severity and KEV status of this vulnerability on your site – with a link back here. The image is updated hourly.

    Badge preview for CVE-2023-6484
    <a href="https://intel.neosec.eu/en/cve/CVE-2023-6484"><img src="https://intel.neosec.eu/badge/cve/CVE-2023-6484.svg?lang=en" alt="CVE-2023-6484 – NEOSEC Intel" height="20"></a>