CVE-2018-11786: Improper Privilege Management in Apache Karaf
Summary
CVE-2018-11786: Improper Privilege Management in Apache Karaf. Affects org.apache.karaf:apache-karaf versions < 4.2.0. Fixed in 4.2.0. How to fix ↓
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Background
Apache Karaf is an open-source OSGi runtime container that provides a lightweight and flexible platform for building and deploying applications. It allows administrators to manage the running instance through an SSH service. The vulnerability in Apache Karaf prior to version 4.2.0 allows users with access to the Karaf console to read and write any file on the file system to which the Karaf process user has access. This can lead to unauthorized access and modification of sensitive files.
Vulnerability Detail
The vulnerability arises from the lack of proper privilege management in Apache Karaf. When the SSH service is enabled, any user with rights to the Karaf console can pivot and gain access to read and write any file on the file system accessible to the Karaf process user. Although measures like chroot and security manager policies can be implemented to restrict file system access, they still allow users with SSH access to the Karaf process to manipulate a significant number of files.
How To Fix
Minimum fixed version
4.2.0
This is the first release that contains the fix.
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Workaround
If upgrading to the latest version is not immediately feasible, administrators can mitigate the risk by disabling the SSH service in Apache Karaf. By disabling SSH, the vulnerability is effectively neutralized, but it may limit the ability to manage the running instance remotely.
Conclusion
The vulnerability in Apache Karaf prior to version 4.2.0 allows unauthorized users to read and write files on the file system accessible to the Karaf process user. Upgrading to the latest version or disabling the SSH service are the recommended solutions to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
Apache Karaf is an open-source OSGi runtime container that provides a lightweight and flexible platform for building and deploying applications.
The vulnerability allows users with access to the Karaf console to read and write any file on the file system accessible to the Karaf process user. This can lead to unauthorized access and modification of sensitive files.
To fix this vulnerability, it is recommended to upgrade to Apache Karaf version 4.2.0 or later.
If upgrading to the latest version is not immediately feasible, administrators can mitigate the risk by disabling the SSH service in Apache Karaf.
Implementing chroot and defining a security manager policy that limits file system access can provide additional protection, but upgrading or disabling SSH is the recommended solution.
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