Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat Connectors | 1.2.9-beta – ≤ 1.2.49 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libapache-mod-jk | 1:1.2.50-1 | — |
| Debian 13 | libapache-mod-jk | 1:1.2.50-1 | — |
| Debian 12 | libapache-mod-jk | 1:1.2.48-2+deb12u2 | — |
| Debian 11 | libapache-mod-jk | 1:1.2.48-1+deb11u2 | DLA-3919-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | libapache-mod-jk | 1:1.2.49-1ubuntu0.1~esm1 | USN-8369-1 |
| Ubuntu Pro 22.04 LTS | libapache-mod-jk | 1:1.2.48-1ubuntu0.1+esm1 | USN-8369-1 |
| Ubuntu Pro 20.04 LTS | libapache-mod-jk | 1:1.2.46-1ubuntu0.1+esm1 | USN-8369-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | libapache-mod-jk | 1:1.2.43-1ubuntu0.1~esm2 | USN-8369-1 |
| Ubuntu Pro 16.04 LTS | libapache-mod-jk | 1:1.2.41-1ubuntu0.1~esm1 | USN-8369-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | mod_jk | 1.2.50-1.el9_4.1 | RHSA-2024:7457 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.2 EUS | mod_jk | 1.2.50-1.el9_2.1 | RHSA-2024:8929 |
| RHEL 9.0 E4S | mod_jk | 1.2.50-1.el9_0.1 | RHSA-2024:8928 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-httpd +6 | 2.4.57-15.el7jbcs | RHSA-2024:6927 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_jk +1 | 1.2.50-3.redhat_1.el7jbcs | RHSA-2024:6927 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_ssl +1 | 1:2.4.57-15.el7jbcs | RHSA-2024:6927 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | mod_jk | 1.2.50-1.el9_4.1 | ALSA-2024:7457 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | mod_jk | 1.2.50-1.el9_4.1 | RLSA-2024:7457 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | apache2-mod_jk | 1.2.50-150100.6.12.1 | SUSE-SU-2025:0102-1 |
| SLES 12 SP5 | apache2-mod_jk | 1.2.50-7.12.1 | SUSE-SU-2025:0143-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.6 | apache2-mod_jk | 1.2.50-150100.6.12.1 | SUSE-SU-2025:0102-1 |
Advisories 11
- ALSA-2024:7457 Moderate: mod_jk bug fix update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2024:8929 Red Hat Security Advisory: mod_jk security update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2024:8928 Red Hat Security Advisory: mod_jk security update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2024:7457 Red Hat Security Advisory: mod_jk bug fix update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2024:6927 Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.57 SP6 security update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- WID-SEC-2024-2205 Apache Tomcat Connectors: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Jul 23, 2026
- USN-8369-1 libapache-mod-jk vulnerability Ubuntu Security Notices (USN) · Jun 2, 2026
- DLA-3919-1 libapache-mod-jk - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2025:0102-1 Security update for apache2-mod_jk SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0143-1 Security update for apache2-mod_jk SUSE / openSUSE Security Updates · Feb 4, 2026
- RLSA-2024:7457 Moderate: mod_jk bug fix update Rocky Linux Security Advisories · Oct 7, 2025
References
- https://lists.apache.org/thread/q1gp7cc38hs1r8gj8gfnopwznd5fpr4d vendor-advisory