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Exploited vulnerability · CISA KEV

Is CVE-2020-2509 exploited? Yes: in CISA KEV since 11 Apr 2022

Gociux · QNAP Network-Attached Storage (NAS) · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2020-2509, QNAP Network-Attached Storage (NAS) Command Injection Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 11 Apr 2022, 359 days after it was published. It affects QNAP Network-Attached Storage (NAS). If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 11 Apr 2022
ransomwareNot knownno confirmed use
EPSStop 5%very likely to be exploited
severity9.8CVSS 3.1 · critical
US federal due2 May 2022BOD 22-01 deadline

What it is

QNAP NAS devices contain a command injection vulnerability which could allow attackers to perform remote code execution.

VendorQNAP (11 exploited CVEs in KEV)
ProductQNAP Network-Attached Storage (NAS)
VulnerabilityQNAP Network-Attached Storage (NAS) Command Injection Vulnerability
WeaknessCWE-77, CWE-78
Published17 Apr 2021
Added to KEV11 Apr 2022
Reported by (CNA)qnap

What to do

  1. Check whether you run it. Look for QNAP Network-Attached Storage (NAS) in your asset inventory, including appliances and cloud images. Stack check lists every exploited QNAP 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 17 Apr 2021.
  4. Get told next time. Email alerts when CISA adds a CVE for QNAP.

References

Questions

Is CVE-2020-2509 being exploited?

Yes. CISA added CVE-2020-2509 to the Known Exploited Vulnerabilities catalog on 11 Apr 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2020-2509 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-2020-2509?

Apply updates per vendor instructions. Check QNAP's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected QNAP Network-Attached Storage (NAS) 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 April 2022 · QNAP scorecard · act-now radar.

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