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Full vulnerability report · 2024
CVE-2024-46544High confidence

Apache Tomcat Connectors: mod_jk: local users can view and modify configuration

Apache Software Foundation · Apache Tomcat Connectors

5.9MediumCVSS 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.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityMediumOperational priority:Medium, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • EPSS is 0.33% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict local access and enforce least privilege on affected hosts.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Apache Software Foundation Apache Tomcat Connectors and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: As exposure requiresRemediation target: Within 365 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Distribution package intelligence

Release-specific package status

Debian, ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

5 package states
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Distribution releaseSource packageVendor stateFixed versionEvidence
Debian trixietrixie · sourcelibapache-mod-jkVendor fix publishedDebian records a fixed source-package version for this release.1:1.2.50-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian bookwormbookworm · sourcelibapache-mod-jkVendor fix publishedDebian records a fixed source-package version for this release.1:1.2.48-2+deb12u2Debian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · sourcelibapache-mod-jkVendor fix publishedDebian records a fixed source-package version for this release.1:1.2.50-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · sourcelibapache-mod-jkVendor fix publishedDebian records a fixed source-package version for this release.1:1.2.50-1Debian Security Tracker ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · esm-appslibapache-mod-jkVendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree.1:1.2.49-1ubuntu0.1~esm1Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

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-2024-46544 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitymod_jk: information Disclosure / DoS
45 fixed

The vendor explicitly identifies these products or versions as containing the fix.

  • jbcs-httpd24-mod_jk-0:1.2.50-3.redhat_1.el7jbcs.src as a component of Red Hat JBoss Core Services on RHEL 7 Server
  • jbcs-httpd24-mod_jk-ap24-0:1.2.50-3.redhat_1.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server
  • jbcs-httpd24-mod_jk-debuginfo-0:1.2.50-3.redhat_1.el7jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 7 Server
  • jbcs-httpd24-mod_jk-0:1.2.50-3.redhat_1.el8jbcs.src as a component of Red Hat JBoss Core Services on RHEL 8
  • jbcs-httpd24-mod_jk-ap24-0:1.2.50-3.redhat_1.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8
  • jbcs-httpd24-mod_jk-ap24-debuginfo-0:1.2.50-3.redhat_1.el8jbcs.x86_64 as a component of Red Hat JBoss Core Services on RHEL 8
  • mod_jk-0:1.2.50-1.el9_0.1.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.0)
  • mod_jk-0:1.2.50-1.el9_0.1.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.0)
  • mod_jk-0:1.2.50-1.el9_0.1.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.0)
  • mod_jk-0:1.2.50-1.el9_0.1.src as a component of Red Hat Enterprise Linux AppStream E4S (v.9.0)
  • mod_jk-0:1.2.50-1.el9_0.1.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.0)
  • mod_jk-debuginfo-0:1.2.50-1.el9_0.1.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.0)
Summary
An Incorrect Default Permissions vulnerability was found in Apache Tomcat Connectors that allows local users to view and modify shared memory containing mod_jk configuration, which may lead to information disclosure and denial of service.
Remediation
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, 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-2024-41869

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

Incorrect Default Permissions vulnerability in Apache Tomcat Connectors allows local users to view and modify shared memory containing mod_jk configuration which may lead to information disclosure and/or denial of service. This issue affects Apache Tomcat Connectors: from 1.2.9-beta through 1.2.49. Only mod_jk on Unix like systems is affected. Neither the ISAPI redirector nor mod_jk on Windows is affected. Users are recommended to upgrade to version 1.2.50, which fixes the issue.

What

Incorrect Default Permissions vulnerability in Apache Tomcat Connectors allows local users to view and modify shared memory containing mod_jk configuration which may lead to information disclosure and/or denial of service. This issue affects Apache Tomcat Connectors: from 1.2.9-beta through 1.2.49. Only mod_jk on Unix like systems is affected. Neither the ISAPI redirector nor mod_jk on Windows is affected. Users are recommended to upgrade to version 1.2.50, which fixes the issue.

Why

During installation, installed file permissions are set to allow anyone to modify those files.

How

An attacker operating through local access may attempt exploitation without authentication or user interaction. If successful, the issue may obtain information outside the intended access boundary.

What

Incorrect Default Permissions vulnerability in Apache Tomcat Connectors allows local users to view and modify shared memory containing mod_jk configuration which may lead to information disclosure and/or denial of service. This issue affects Apache Tomcat Connectors: from 1.2.9-beta through 1.2.49. Only mod_jk on Unix like systems is affected. Neither the ISAPI redirector nor mod_jk on Windows is affected. Users are recommended to upgrade to version 1.2.50, which fixes the issue.

Why

During installation, installed file permissions are set to allow anyone to modify those files.

How

An attacker operating through local access may attempt exploitation without authentication or user interaction. If successful, the issue may obtain information outside the intended access boundary.

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
local access → Incorrect Default Permissions → obtain information outside the intended access boundary
Attack surface
Local
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
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-276 ↗

CWE-276: Incorrect Default Permissions. During installation, installed file permissions are set to allow anyone to modify those files.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CLowConfidentiality impact: A successful attack can cause a limited loss.ILowIntegrity impact: A successful attack can cause a limited loss.ALowAvailability impact: A successful attack can cause a limited loss.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
UnauthenticatedDenial of serviceCWE-276
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-2024-2205Apache Tomcat Connectors: Schwachstelle ermöglicht Denial of Service

Ein lokaler Angreifer kann eine Schwachstelle in Apache Tomcat Connectors ausnutzen, um einen Denial of Service Angriff durchzuführen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20240925Security Bulletin 25 Sep 2024

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 25 Sep 2024, published on 25 September 2024. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2024-000108Apache TomcatにおけるTLSハンドシェイク処理の不備

The Apache Software Foundationが提供するApache Tomcatには、TLSハンドシェイクの処理に不備があり、サービス運用妨害（DoS）状態となる可能性があります（CWE-401、CVE-2024-38286）。 この脆弱性情報は、下記の方が製品開発者に直接報告し、製品開発者との調整を経て情報セキュリティ早期警戒パートナーシップに基づきIPAへ報告し、JPCERT/CCが開発者と本アドバイザリ公表の調整を行いました。 報告者：株式会社ノースグリッド 尾崎 氏

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2024-008893Apache Tomcat Connector（mod_jk）における不適切なデフォルトパーミッションの脆弱性

The Apache Software Foundation から、Apache Tomcat Connector（mod_jk）の脆弱性に対するアップデートが公開されました。 　* Unix 系システムの JkShmFile ディレクティブによって設定されたメモリマップファイルに対するデフォルトのパーミッションが正しくないため、ローカルユーザーが mod_jk 設定情報とステータス情報を含む共有メモリの内容を表示および変更できる問題（CVE-2024-46544、CWE-276）

Official advisory ↗
03

Patch and workaround

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.
Patch available
Affected
Apache Tomcat Connectors: 1.2.9-beta ≤ 1.2.49
Fixed
Action
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 23 Sept 2024 · Last source change 31 Oct 2024, 19:59 UTC · CWE-276 · Incorrect Default Permissions

CVE recordCVE.org · 5.1
CVSS sourceCISA ADP
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-2024-41869
Product sourceCNA
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    1.2.9-beta ≤ 1.2.49 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    1.2.9-beta ≤ 1.2.49 · Fixed: Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
    Red Hat Product Security ↗
  2. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    Red Hat Product Security ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release recorded from official guidance
ENISA EUVD · EUVD-2024-41869↗Red Hat Product Security security advisory↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
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.
Free version - for non-commercial use only.CVE-2024-46544 · cve.blacktree.nl