Skip to main content

CVE-2021-21551

Dell — Dell dbutil Driver Insufficient Access Control Vulnerability

Dell · CWE-782 · in CISA KEV since 2022-03-31

KEV since 2022 · listed over a yearCISA KEVActively Exploited
79

EVRS 79 of 100 Urgent

Patch This Cycle

Rank 617 of 2,960 tracked

Download PDF

Why it scores 79

Evidence available: 6 of 7 signals

Listed in the CISA KEV catalog, and an EPSS probability of 0.801.

  • CISA KEVApplied
  • RansomwareDid not apply
  • Vendor exploitationDid not apply
  • EPSSApplied
  • Microsoft Exploitability IndexNot applicable
  • Pre-patch disclosureNo data
  • KEV recencyDid not apply
  • CVSSApplied

The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data

Fix

Patch or fixed version identified

CISA required action

Fixed in

dbutil: update to a version newer than 2.3

Affected versions

  • dbutil<= 2.3
  • alienware 14
  • alienware 17 51m r2
  • alienware area 51
  • alienware asm100
  • alienware asm100r2
  • alienware m14xr2
  • alienware m15 r4

+560 more affected products; see the full list at NVD.

Remediation

Apply updates per vendor instructions.

Fixed versions from NVD.

Evidence

Each value with its source
MeasureValueSource
CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. 7.8 NVD
FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. 0.801 (99.62nd pctl) FIRST EPSS
Actively exploitedWhether a source of record has confirmed attacks using it in the wild. Confirmed CISA KEV
Ransomware campaign useWhether CISA has seen ransomware operators use it. Unknown or none CISA KEV
CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. 2022-04-21 · KEV since 2022 · listed over a year CISA KEV
Public exploit moduleA module existing is not the same as active exploitation. Public module exists Metasploit
EUVD cross-referenceENISA's record: CVSS 8.8 (v3.1), assigned by dell. Listed ENISA EUVD

Description

NVD

Dell dbutil_2_3.sys driver contains an insufficient access control vulnerability which may lead to escalation of privileges, denial of service, or information disclosure. Local authenticated user access is required.

What CISA says to do

Public module

Metasploit lists a public good-rank module for this CVE: Dell DBUtil_2_3.sys IOCTL memmove (windows/local/cve_2021_21551_dbutil_memmove). A module existing is not the same as active exploitation; see metasploit.com.