VulnerabilityAnalyzed
CVE-2021-21551
Dell dbutil Driver Insufficient Access Control Vulnerability
KEVHIGH 7.8EPSS 79.2%
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 21 April 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 79.25% probability · 100th percentile
- CISA KEV
- Listed 31 March 2022 · due 21 April 2022
- Weakness
- CWE-782
- Affected
- dell/dbutil
- Source
- security_alert@emc.com
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2021-21551
References
- http://packetstormsecurity.com/files/162604/Dell-DBUtil_2_3.sys-IOCTL-Memory-Read-Write.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/162739/DELL-dbutil_2_3.sys-2.3-Arbitrary-Write-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
- https://www.dell.com/support/kbdoc/en-us/000186019/dsa-2021-088-dell-client-platform-security-update-for-dell-driver-insufficient-access-control-vulnerabilityMitigation, Vendor Advisory
- http://packetstormsecurity.com/files/162604/Dell-DBUtil_2_3.sys-IOCTL-Memory-Read-Write.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/162739/DELL-dbutil_2_3.sys-2.3-Arbitrary-Write-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
- https://www.dell.com/support/kbdoc/en-us/000186019/dsa-2021-088-dell-client-platform-security-update-for-dell-driver-insufficient-access-control-vulnerabilityMitigation, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21551US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.