CVE-2014-8583

What it actually does

mod_wsgi fails to safely handle cases where group privilege dropping is unsuccessful during daemon process group creation, allowing unintended retention or escalation of process privileges on the host.

Why it matters to the business

Local attackers can obtain elevated access to the web server host, risking compromise of hosted applications, data, and the underlying system; the issue affects widely deployed Apache deployments though exploitation requires local access and specific configuration.

How an attack unfolds

An attacker with local access to the server configures a mod_wsgi daemon process group that encounters a privilege-dropping failure condition; the incomplete handling allows the process to retain or acquire higher privileges than intended, enabling further privilege escalation.

How to fix it

Upgrade mod_wsgi to version 4.2.4 or later; review all daemon process group configurations to ensure privilege-dropping behavior is correctly enforced; restart affected Apache instances after the update.

How to confirm the fix worked

Verify installed mod_wsgi version is 4.2.4 or newer; test daemon process startup under configurations that previously caused privilege drop failures; confirm process privileges match expected reduced levels after startup.

Typical attack path

1. Obtain local shell or code execution on the target host
2. Deploy or modify a mod_wsgi configuration that creates a daemon process group
3. Trigger the condition in which group privilege dropping cannot complete
4. Leverage the resulting elevated process context to access restricted resources or execute privileged code

How to detect it

Review Apache and mod_wsgi error logs for messages related to group privilege dropping failures; inspect running process privileges for mod_wsgi daemon workers that exceed expected permissions; examine historical system logs around process startup times for anomalous privilege events.

What your security team should do

• Immediately upgrade all mod_wsgi installations to 4.2.4 or later
• Audit Apache configurations for daemon process groups and enforce least-privilege settings
• Add mod_wsgi version checks to vulnerability scanning and patch management processes
• Monitor system logs for privilege-related errors during process initialization