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Exploited vulnerability · CISA KEV

Is CVE-2021-21551 exploited? Yes: in CISA KEV since 31 Mar 2022

Gociux · Dell dbutil Driver · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2021-21551, Dell dbutil Driver Insufficient Access Control Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 31 Mar 2022, 331 days after it was published. It affects Dell dbutil Driver. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 31 Mar 2022
ransomwareNot knownno confirmed use
EPSStop 1%among the most likely CVEs to be exploited
severity8.8CVSS 3.1 · high
US federal due21 Apr 2022BOD 22-01 deadline

What it is

Dell dbutil driver contains an insufficient access control vulnerability which may lead to escalation of privileges, denial-of-service (DoS), or information disclosure.

VendorDell (2 exploited CVEs in KEV)
Productdbutil Driver
VulnerabilityDell dbutil Driver Insufficient Access Control Vulnerability
WeaknessCWE-782
Published4 May 2021
Added to KEV31 Mar 2022
Reported by (CNA)dell

What to do

  1. Check whether you run it. Look for dbutil Driver in your asset inventory, including appliances and cloud images. Stack check lists every exploited Dell 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 4 May 2021.
  4. Get told next time. Email alerts when CISA adds a CVE for Dell.

References

Questions

Is CVE-2021-21551 being exploited?

Yes. CISA added CVE-2021-21551 to the Known Exploited Vulnerabilities catalog on 31 Mar 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2021-21551 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-2021-21551?

Apply updates per vendor instructions. Check Dell's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected dbutil Driver 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 March 2022 · Dell scorecard · act-now radar.

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