CVE-2021-3129 Laravel Ignition: dangerous file upload
In plain words: The program accepts files it should refuse, such as programs disguised as ordinary uploads. The attacker can place and run their own tools on the server.
Confirmed exploited by CISA on · US federal patch deadline Oct 9, 2023
What to do
- Install Laravel's security update for Ignition. 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
- Laravel Ignition File Upload Vulnerability
- Product
- Laravel Ignition
- CISA description
- Laravel Ignition contains a file upload vulnerability that allows unauthenticated remote attackers to execute malicious code due to insecure usage of file_get_contents() and file_put_contents().
- Type of flaw
- Dangerous file upload
- Confirmed exploited
- Sep 18, 2023 — known to be used in ransomware attacks
- US federal patch deadline
- Oct 9, 2023
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Answering about CVE-2021-3129 ·
Questions about CVE-2021-3129
Is CVE-2021-3129 being exploited?
Yes. CISA added CVE-2021-3129 to its Known Exploited Vulnerabilities catalog on Sep 18, 2023, which means there is reliable evidence of real-world attacks, including by ransomware groups.
How do I fix CVE-2021-3129?
Install Laravel's security update for Ignition. 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-2021-3129?
Only if you use Laravel Ignition. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.