Security researcher found several vulnerabilities points in a driver that has been installed on millions of Dell Windows systems over the past 12 years. These vulnerabilities could allow an attacker to perform privilege escalation.
The vulnerability (CVE-2021-21551) in Dell's DBUtil Windows driver is found in All-in-One and 2-in-1 systems.
Dell, on the other hand, issued the security warning DSA-2021-088: Dell Client Platform Security Update for an Insufficient Access Control Vulnerability in the Dell dbutil Driver and FAQ says:
Dell dbutil_2_3.sys driver contains access control vulnerabilities, which could lead to escalation of privileges, denial of service or disclosure of information. Local user access authentication required.
The vulnerability (CVE-2021-21551) exists in the program driving dbutil_2_3.sys και έχει πάρει βαθμολογία σοβαρότητας 8 (στα 10). Ο driver ενδέχεται να έχει εγκατασταθεί σχεδόν σε οποιοδήποτε system Dell running it operating system of Windows if the firmware update utility packages, Dell Command Update, Dell Update, Alienware Update, Dell System Inventory Agent, or Dell Platform tags.
Kasif Dekel, a security researcher at SentinelOne, he said the following vulnerabilities cited as CVE-2021-21551 but did not disclose all details, for obvious reasons.
- CVE-2021-21551: Local Elevation Of Privileges # 1 - Memory corruption
- CVE-2021-21551: Local Elevation Of Privileges # 2 - Memory corruption
- CVE-2021-21551: Local Elevation Of Privileges # 3 - Lack of input validation
- CVE-2021-21551: Local Elevation Of Privileges # 4 - Lack of input validation
- CVE-2021-21551: Denial Of Service - Code logic issue
These vulnerabilities are not considered very critical, because an attacker who tries to exploit them must have already compromised the computer. However, they allow malicious users and malware to remain on the infected system.
