CVE-2024-47177

What it actually does

Any value passed to FoomaticRIPCommandLine via a PPD file is executed as a user-controlled command, enabling remote command execution when combined with related logic issues.

Why it matters to the business

Attackers can gain unauthorized control over printing-related systems, leading to potential data breaches, service disruption, and the need for urgent patching across affected deployments.

How an attack unfolds

An attacker supplies a malicious PPD file containing arbitrary commands in the FoomaticRIPCommandLine directive; when processed alongside companion flaws, this results in remote code execution on the target system.

How to fix it

Upgrade github.com/ThomasLeister/prosody-filer to version 1.0.1 or later; apply vendor patches for CUPS and cups-filters components; disable untrusted PPD file processing where feasible.

How to confirm the fix worked

Verify the installed version of affected packages matches or exceeds the fixed release; test that FoomaticRIPCommandLine values from untrusted PPD files are no longer executed.

Typical attack path

1. Identify a reachable printing service or dependent component accepting PPD files
2. Craft a malicious PPD file embedding commands in the FoomaticRIPCommandLine parameter
3. Deliver the PPD file through an available input vector such as a print job submission
4. Trigger processing that combines the injection with other logic bugs to achieve code execution

How to detect it

Inspect logs for unexpected command execution or unusual PPD file processing; review print job submissions containing FoomaticRIPCommandLine directives from external sources.

What your security team should do

• Prioritize upgrading prosody-filer to 1.0.1 within the next maintenance window
• Review and restrict sources of PPD files in the environment
• Monitor for new exploit activity given weaponized maturity status