CVE-2021-25296 Nagios Nagios XI: command or code injection
In plain words: The program treats text it receives as instructions instead of plain data. The attacker can run commands on the machine — often the whole device is taken over.
Confirmed exploited by CISA on · US federal patch deadline Feb 1, 2022
What to do
- Install Nagios's security update for Nagios XI. 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
- Nagios XI OS Command Injection
- Product
- Nagios Nagios XI
- CISA description
- Nagios XI contains a vulnerability which can lead to OS command injection on the Nagios XI server.
- Type of flaw
- Command or code injection (CWE-78, CWE-138)
- Confirmed exploited
- Jan 18, 2022
- US federal patch deadline
- Feb 1, 2022
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Answering about CVE-2021-25296 ·
Questions about CVE-2021-25296
Is CVE-2021-25296 being exploited?
Yes. CISA added CVE-2021-25296 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-2021-25296?
Install Nagios's security update for Nagios XI. 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-2021-25296?
Only if you use Nagios Nagios XI. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.