CVE-2019-3929 Crestron Multiple Products: web page flaw
In plain words: A web app can be made to act on someone's behalf or reach places it should not. Stolen sessions, actions taken as the victim, or access to internal systems.
Confirmed exploited by CISA on · US federal patch deadline May 6, 2022
What to do
- Install Crestron's security update for Multiple Products. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Keep a list of every internet-facing server you run so nothing is forgotten.
- Patch anything in this catalog first, ahead of normal patch cycles.
- Put admin and file-transfer apps behind a VPN or single sign-on instead of the open internet.
Who is affected
Work IT. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.
What's at risk: Mass data theft and ransomware: a single flaw in a file-transfer or email server has exposed thousands of organisations at once.
The details
- Official name
- Crestron Multiple Products Command Injection Vulnerability
- Product
- Crestron Multiple Products
- CISA description
- Multiple Crestron products are vulnerable to command injection via the file_transfer.cgi HTTP endpoint. A remote, unauthenticated attacker can use this vulnerability to execute operating system commands as root.
- Type of flaw
- Web page flaw (CWE-79)
- Confirmed exploited
- Apr 15, 2022
- US federal patch deadline
- May 6, 2022
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Answering about CVE-2019-3929 ·
Questions about CVE-2019-3929
Is CVE-2019-3929 being exploited?
Yes. CISA added CVE-2019-3929 to its Known Exploited Vulnerabilities catalog on Apr 15, 2022, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2019-3929?
Install Crestron's security update for Multiple Products. If no update exists, follow the vendor's workaround or stop using the product until one ships. Keep a list of every internet-facing server you run so nothing is forgotten.
Am I affected by CVE-2019-3929?
Only if you use Crestron Multiple Products. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.