Dell dbutil_2_3.sys driver contains an insufficient access control vulnerability which may lead to escalation of privileges, denial of servi
The Dell dbutil_2_3.sys driver on Dell Client Windows systems, installed by impacted Dell firmware utilities, has insufficient access control. CVSS rates it High. Update to version 4.2 or greater.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Actively exploited
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
The Dell dbutil_2_3.sys driver, a Windows kernel driver shipped with various Dell software, is affected by an insufficient access control flaw. A local user with valid credentials could exploit it to escalate privileges, cause a denial of service, or access sensitive information.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
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.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- CISA remediation deadline
Due date for US federal agencies to patch
- Record last updated
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- Dell dbutil
2.3
References 3
Questions about CVE-2021-21551
What does this mean?
The dbutil_2_3.sys driver has an insufficient access control flaw. It may lead to escalation of privileges, denial of service, or information disclosure.Source: dell.com
Am I affected, and how do I check?
The driver may be present on Dell Client platforms running Windows if one or more impacted Dell products or components installed it. To check, look for dbutil_2_3.sys on the Windows system.Source: dell.com
What should I do about it?
Manually update the dbutil driver to version 4.2 or greater.Source: dell.com
Is it being exploited?
Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2022-03-31, which means it has evidence of attacks. No public exploit code is tracked.Source: cisa.gov, cve.now feed data
What if there's no patch?
Apply Microsoft's recommended driver block rules to prevent re-installation of the impacted driver.Source: dell.com