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Exploited vulnerability · CISA KEV

Is CVE-2021-25298 exploited? Yes: in CISA KEV since 18 Jan 2022

Gociux · Nagios XI · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2021-25298, Nagios XI OS Command Injection, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 18 Jan 2022, 337 days after it was published. It affects Nagios XI. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 18 Jan 2022
ransomwareNot knownno confirmed use
EPSStop 1%among the most likely CVEs to be exploited
severity8.8CVSS 3.1 · high
US federal due1 Feb 2022BOD 22-01 deadline

What it is

Nagios XI contains a vulnerability which can lead to OS command injection on the Nagios XI server.

VendorNagios (4 exploited CVEs in KEV)
ProductNagios XI
VulnerabilityNagios XI OS Command Injection
WeaknessCWE-78, CWE-138
Published15 Feb 2021
Added to KEV18 Jan 2022
Reported by (CNA)mitre

What to do

  1. Check whether you run it. Look for Nagios XI in your asset inventory, including appliances and cloud images. Stack check lists every exploited Nagios CVE at once.
  2. Apply the fix. Apply updates per vendor instructions.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 15 Feb 2021.
  4. Get told next time. Email alerts when CISA adds a CVE for Nagios.

Other exploited CVEs in Nagios XI

References

Questions

Is CVE-2021-25298 being exploited?

Yes. CISA added CVE-2021-25298 to the Known Exploited Vulnerabilities catalog on 18 Jan 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2021-25298 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2021-25298?

Apply updates per vendor instructions. Check Nagios's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Nagios XI and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in January 2022 · Nagios scorecard · act-now radar.

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