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Exploited vulnerability · CISA KEV

Is CVE-2024-20399 exploited? Yes: in CISA KEV since 2 Jul 2024

Gociux · Cisco NX-OS · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2024-20399, Cisco NX-OS Command Injection Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 2 Jul 2024, 1 days after it was published. It affects Cisco NX-OS. If you run it, CISA's required action is: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

exploitedYesCISA KEV · 2 Jul 2024
ransomwareNot knownno confirmed use
EPSStop 10%more likely than most to be exploited
severity6CVSS 3.1 · medium
US federal due23 Jul 2024BOD 22-01 deadline

What it is

Cisco NX-OS contains a command injection vulnerability in the command line interface (CLI) that could allow an authenticated, local attacker to execute commands as root on the underlying operating system of an affected device.

VendorCisco (103 exploited CVEs in KEV)
ProductNX-OS
VulnerabilityCisco NX-OS Command Injection Vulnerability
WeaknessCWE-78
Published1 Jul 2024
Added to KEV2 Jul 2024
Reported by (CNA)cisco

What to do

  1. Check whether you run it. Look for NX-OS in your asset inventory, including appliances and cloud images. Stack check lists every exploited Cisco CVE at once.
  2. Apply the fix. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
  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 1 Jul 2024.
  4. Get told next time. Email alerts when CISA adds a CVE for Cisco.

References

Questions

Is CVE-2024-20399 being exploited?

Yes. CISA added CVE-2024-20399 to the Known Exploited Vulnerabilities catalog on 2 Jul 2024, which means there is reliable evidence of exploitation in the wild.

Is CVE-2024-20399 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-2024-20399?

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Check Cisco's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected NX-OS 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 July 2024 · Cisco scorecard · act-now radar.

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