Exploit.CVE202121551

Short bio

Exploit.CVE202121551 is Malwarebytes detection name for an exploitable Dell driver with the filename dbutil_2_3.sys.

Type and source of infection

The 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.
This driver file may have been installed on your Dell Windows operating system when you used firmware update utility packages, Dell Command Update, Dell Update, Alienware Update, Dell System Inventory Agent, or Dell Platform Tags, including when using any Dell notification solution to update drivers, BIOS, or firmware for your system.

Aftermath

Dell has remediated the dbutil driver and has released firmware update utility packages for supported platforms running Windows 10. Keeping the vulnerable driverputs your system at risk.

Protection

By removing this file, Malwarebytes protects users against the possible exploitation of the vulnerability listed as CVE-2021-21551.

Remediation

Malwarebytes can detect and remove Exploit.CVE202121551 without further user interaction.

  1. Please download Malwarebytes to your desktop.
  2. Double-click MBSetup.exe and follow the prompts to install the program.
  3. When your Malwarebytes for Windows installation completes, the program opens to the Welcome to Malwarebytes screen.
  4. Click on the Get started button.
  5. Click Scan to start a Threat Scan.
  6. Click Quarantine to remove the found threats.
  7. Reboot the system if prompted to complete the removal process.

Add an exclusion

Should users wish to keep this program and exclude it from being detected in future scans, they can add the program to the exclusions list. Here’s how to do it.

  • Open Malwarebytes for Windows.
  • Click the Detection History
  • Click the Allow List
  • To add an item to the Allow List, click Add.
  • Select the exclusion type Allow a file or folder and use the Select a folder button to select the main folder for the software that you wish to keep.
  • Repeat this for any secondary files or folder(s) that belong to the software.

If you want to allow the program to connect to the Internet, for example to fetch updates, also add an exclusion of the type Allow an application to connect to the internet and use the Browse button to select the file you wish to grant access.

Associated threats

  • Exploit.CVE202121551.Vulnerable

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