A flaw was found in Wildfly Elytron in versions prior to 1.10.14.Final, prior to 1.15.5.Final and prior to 1.16.1.Final where ScramServer may be susceptible to Timing Attack if enabled
Unknown · wildfly-elytron
5.3MediumCVSS 3.1
Recommended action
Scheduled
Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.
These OSV and GitHub advisory ranges apply only to the named package and ecosystem. A listed fixed version is not a universal product patch or proof that an update is installed.
Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.
1 current
CVE-2021-3642 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitywildfly-elytron: possible timing attack in ScramServer
4 known affected
The vendor explicitly identifies these products as affected by this CVE.
wildfly-elytron as a component of Red Hat build of Quarkus
wildfly-elytron as a component of Red Hat Integration Camel K 1
wildfly-elytron as a component of Red Hat Integration Camel Quarkus 1
wildfly-elytron as a component of Red Hat JBoss Enterprise Application Platform Expansion Pack
Summary
A flaw was found in Wildfly Elytron where ScramServer may be susceptible to Timing Attack if enabled. The highest threat of this vulnerability is confidentiality.
Remediation
Before applying this update, back up your existing Red Hat JBoss Enterprise Application Platform installation and deployed applications. For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
Optional official sources
National CERT insights ?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.
Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.
Official European source
ENISA European Vulnerability Database
Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.
1 current
ENISA EUVD identifier
EUVD-2022-2493
No EUVD known-exploited evidence
ENISA has published the identifier mapping but no EUVD description has been stored yet.
EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled
Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.
Patch available
01
What, why and how
A flaw was found in Wildfly Elytron in versions prior to 1.10.14.Final, prior to 1.15.5.Final and prior to 1.16.1.Final where ScramServer may be susceptible to Timing Attack if enabled. The highest threat of this vulnerability is confidentiality.
What
A flaw was found in Wildfly Elytron in versions prior to 1.10.14.Final, prior to 1.15.5.Final and prior to 1.16.1.Final where ScramServer may be susceptible to Timing Attack if enabled. The highest threat of this vulnerability is confidentiality.
Why
The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.
How
An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
What
A flaw was found in Wildfly Elytron in versions prior to 1.10.14.Final, prior to 1.15.5.Final and prior to 1.16.1.Final where ScramServer may be susceptible to Timing Attack if enabled. The highest threat of this vulnerability is confidentiality.
Why
The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.
How
An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
02
Exploit reality and attack path
CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.
Observed exploitation ?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.No confirmed evidence
No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.
Public PoC / exploit material ?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.None recorded
No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.
Likely attack path
a network path → Observable Discrepancy → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
Low: a basic authenticated account is required
User interaction
None
Attack complexity
High: exploitation depends on specific conditions
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness ?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-203: Observable Discrepancy. The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.
CVSS vector ?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVNetworkAttack vector: The vulnerable component can be reached over a network.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.INoneIntegrity impact: No direct loss is represented by this metric.ANoneAvailability impact: No direct loss is represented by this metric.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkCWE-203
A
Official authority intelligence
Only matched European and national findings are included. Language selectors and unavailable sources are omitted.
ENISA EUVD · EUVD-2022-2493Official EUVD mapping
0 linked advisory records.
Official EUVD record ↗BSI · German · WID-SEC-2022-0607Red Hat FUSE: Mehrere Schwachstellen
Ein entfernter, anonymer, authentisierter oder lokaler Angreifer kann mehrere Schwachstellen in Red Hat FUSE ausnutzen, um vertrauliche Informationen offenzulegen, beliebigen Code auszuführen, einen Denial of Service Zustand herbeizuführen, Sicherheitsmaßnahmen zu umgehen, Daten und Informationen zu manipulieren und seine Privilegien zu erweitern.
Official advisory ↗Cyber Security Agency of Singapore · English · CSA-SB-20210811Security Bulletin 11 Aug 2021
The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 11 Aug 2021, published on 11 August 2021. Open the linked bulletin for the product, severity and reference information published in that issue.
Official advisory ↗JVN iPedia · Japanese · JVNDB-2021-009558Wildfly Elytron における観測可能な不一致に関する脆弱性
Operational remediation based on structured source evidence.
Status ?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Before applying this update, back up your existing Red Hat JBoss Enterprise Application Platform installation and deployed applications. For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04
Evidence and provenance
Published 5 Aug 2021 · Last source change 3 Aug 2024, 17:01 UTC · CWE-203 · Observable Discrepancy
CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source ?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2022-2493
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD modified after enrichment
Missing structured fields: affected product. Missing data is not evidence of low risk; review the primary advisory.
Affected versionsThe structured affected or fixed version information changed.
Before
Wildfly Elytron 1.10.14.Final, Wildfly Elytron 1.15.5.Final, Wildfly Elytron 1.16.1.Final · Fixed: No fixed version is explicitly recorded in the structured CVE data.
After
Wildfly Elytron 1.10.14.Final, Wildfly Elytron 1.15.5.Final, Wildfly Elytron 1.16.1.Final · Fixed: Before applying this update, back up your existing Red Hat JBoss Enterprise Application Platform installation and deployed applications. For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
Affected versionsThe structured affected or fixed version information changed.
Before
wildfly-elytron as a component of Red Hat build of Quarkus; wildfly-elytron as a component of Red Hat Integration Camel K 1; wildfly-elytron as a component of Red Hat Integration Camel Quarkus 1 · Fixed: eap7-apache-cxf-0:3.3.12-1.redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-apache-cxf-0:3.3.12-1.redhat_00001.1.el6eap.src as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-apache-cxf-rt-0:3.3.12-1.redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-apache-cxf-services-0:3.3.12-1.redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-apache-cxf-tools-0:3.3.12-1.redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-ironjacamar-0:1.5.3-1.Final_redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-ironjacamar-0:1.5.3-1.Final_redhat_00001.1.el6eap.src as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-ironjacamar-common-api-0:1.5.3-1.Final_redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-ironjacamar-common-impl-0:1.5.3-1.Final_redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-ironjacamar-common-spi-0:1.5.3-1.Final_redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-ironjacamar-core-api-0:1.5.3-1.Final_redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-ironjacamar-core-impl-0:1.5.3-1.Final_redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-ironjacamar-deployers-common-0:1.5.3-1.Final_redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-ironjacamar-jdbc-0:1.5.3-1.Final_redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-ironjacamar-validator-0:1.5.3-1.Final_redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jakarta-el-0:3.0.3-3.redhat_00007.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jakarta-el-0:3.0.3-3.redhat_00007.1.el6eap.src as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-ejb-client-0:4.0.43-1.Final_redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-ejb-client-0:4.0.43-1.Final_redhat_00001.1.el6eap.src as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-server-migration-0:1.7.2-10.Final_redhat_00011.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-server-migration-0:1.7.2-10.Final_redhat_00011.1.el6eap.src as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-server-migration-cli-0:1.7.2-10.Final_redhat_00011.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-server-migration-core-0:1.7.2-10.Final_redhat_00011.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-server-migration-eap6.4-0:1.7.2-10.Final_redhat_00011.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-server-migration-eap6.4-to-eap7.3-0:1.7.2-10.Final_redhat_00011.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-server-migration-eap7.0-0:1.7.2-10.Final_redhat_00011.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-server-migration-eap7.1-0:1.7.2-10.Final_redhat_00011.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-server-migration-eap7.2-0:1.7.2-10.Final_redhat_00011.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-server-migration-eap7.2-to-eap7.3-0:1.7.2-10.Final_redhat_00011.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-server-migration-eap7.3-server-0:1.7.2-10.Final_redhat_00011.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; and 240 more
After
wildfly-elytron as a component of Red Hat build of Quarkus; wildfly-elytron as a component of Red Hat Integration Camel K 1; wildfly-elytron as a component of Red Hat Integration Camel Quarkus 1; wildfly-elytron as a component of Red Hat JBoss Enterprise Application Platform Expansion Pack · Fixed: eap7-apache-cxf-0:3.3.12-1.redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-apache-cxf-0:3.3.12-1.redhat_00001.1.el6eap.src as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-apache-cxf-rt-0:3.3.12-1.redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-apache-cxf-services-0:3.3.12-1.redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-apache-cxf-tools-0:3.3.12-1.redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-ironjacamar-0:1.5.3-1.Final_redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-ironjacamar-0:1.5.3-1.Final_redhat_00001.1.el6eap.src as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-ironjacamar-common-api-0:1.5.3-1.Final_redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-ironjacamar-common-impl-0:1.5.3-1.Final_redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-ironjacamar-common-spi-0:1.5.3-1.Final_redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-ironjacamar-core-api-0:1.5.3-1.Final_redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-ironjacamar-core-impl-0:1.5.3-1.Final_redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-ironjacamar-deployers-common-0:1.5.3-1.Final_redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-ironjacamar-jdbc-0:1.5.3-1.Final_redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-ironjacamar-validator-0:1.5.3-1.Final_redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jakarta-el-0:3.0.3-3.redhat_00007.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jakarta-el-0:3.0.3-3.redhat_00007.1.el6eap.src as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-ejb-client-0:4.0.43-1.Final_redhat_00001.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-ejb-client-0:4.0.43-1.Final_redhat_00001.1.el6eap.src as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-server-migration-0:1.7.2-10.Final_redhat_00011.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-server-migration-0:1.7.2-10.Final_redhat_00011.1.el6eap.src as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-server-migration-cli-0:1.7.2-10.Final_redhat_00011.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-server-migration-core-0:1.7.2-10.Final_redhat_00011.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-server-migration-eap6.4-0:1.7.2-10.Final_redhat_00011.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-server-migration-eap6.4-to-eap7.3-0:1.7.2-10.Final_redhat_00011.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-server-migration-eap7.0-0:1.7.2-10.Final_redhat_00011.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-server-migration-eap7.1-0:1.7.2-10.Final_redhat_00011.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-server-migration-eap7.2-0:1.7.2-10.Final_redhat_00011.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-server-migration-eap7.2-to-eap7.3-0:1.7.2-10.Final_redhat_00011.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; eap7-jboss-server-migration-eap7.3-server-0:1.7.2-10.Final_redhat_00011.1.el6eap.noarch as a component of Red Hat JBoss EAP 7.3 for RHEL 6 Server; and 240 more
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.