Ubuntu USN · USN-8369-2

mod_jk regression

Published: Thu, 23 Jul 2026 00:33

CVE-2023-41081

Summary

USN-8369-1 introduced a regression in mod_jk

Details

USN-8369-1 fixed a vulnerability in mod_jk. It was discovered that for Ubuntu 18.04 LTS, during the update preparation phase, a previous fix for CVE-2023-41081 was incorrectly dropped. This update reintroduces the fix for CVE-2023-41081. We apologize for the inconvenience. Original advisory details: It was discovered that Apache Tomcat Connectors used incorrect default permissions for shared memory on Unix-like systems. A local attacker could possibly use this issue to view or modify mod_jk configuration data in shared memory, resulting in sensitive information exposure or a denial of service.

Recommended actions per Ubuntu release

StackPatch playbook auto-generated per release codename and per affected package.

Ubuntu xenial

libapache-mod-jk→1:1.2.41-1ubuntu0.1~esm2apt_upgrade_esm
Fixed at 1:1.2.41-1ubuntu0.1~esm2 — ESM-only. Enable Ubuntu Pro (free for 5 personal machines) or treat as watch item.
```
sudo pro attach <token>
sudo apt-get update
sudo apt-get install --only-upgrade -y libapache-mod-jk=1:1.2.41-1ubuntu0.1~esm2
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.
libapache-mod-jk-doc→1:1.2.41-1ubuntu0.1~esm2apt_upgrade_esm
Fixed at 1:1.2.41-1ubuntu0.1~esm2 — ESM-only. Enable Ubuntu Pro (free for 5 personal machines) or treat as watch item.
```
sudo pro attach <token>
sudo apt-get update
sudo apt-get install --only-upgrade -y libapache-mod-jk-doc=1:1.2.41-1ubuntu0.1~esm2
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.
libapache2-mod-jk→1:1.2.41-1ubuntu0.1~esm2apt_upgrade_esm
Fixed at 1:1.2.41-1ubuntu0.1~esm2 — ESM-only. Enable Ubuntu Pro (free for 5 personal machines) or treat as watch item.
```
sudo pro attach <token>
sudo apt-get update
sudo apt-get install --only-upgrade -y libapache2-mod-jk=1:1.2.41-1ubuntu0.1~esm2
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.

Are YOU affected by USN-8369-2?

5-second check on your actual server. Reads /etc/os-release, uname -r, and dpkg-query; matches against the live USN + Debian Security Tracker feeds; tells you whether USN-8369-2 (and any other live CVE) applies. Anonymous, no signup.

curl https://mindsparkstack.com/scan.sh | bash

Form-based quickscan Read the bash source first

References

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