CVE-2021-40870 Aviatrix Aviatrix Controller: 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 Feb 1, 2022
What to do
- Install Aviatrix's security update for Aviatrix Controller. 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
- Aviatrix Controller Unrestricted Upload of File
- Product
- Aviatrix Aviatrix Controller
- CISA description
- Unrestricted upload of a file with a dangerous type is possible, which allows an unauthenticated user to execute arbitrary code via directory traversal.
- Type of flaw
- Dangerous file upload (CWE-25, CWE-96)
- Confirmed exploited
- Jan 18, 2022
- US federal patch deadline
- Feb 1, 2022
Ask Cleus about it
Ask about a vulnerability, an update, a weird message, or the news. Plain-word answers, free, no account.
Answering about CVE-2021-40870 ·
Questions about CVE-2021-40870
Is CVE-2021-40870 being exploited?
Yes. CISA added CVE-2021-40870 to its Known Exploited Vulnerabilities catalog on Jan 18, 2022, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2021-40870?
Install Aviatrix's security update for Aviatrix Controller. 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-2021-40870?
Only if you use Aviatrix Aviatrix Controller. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.