Personal computer maker Dell has issued an update to take care of a number of critical privilege escalation vulnerabilities that went undetected considering that 2009, potentially enabling attackers to achieve kernel-mode privileges and bring about a denial-of-assistance situation.
The issues, described to Dell by researchers from SentinelOne on Dec. 1, 2020, reside in a firmware update driver named “dbutil_2_3.sys” that will come pre-put in on its products. Hundreds of tens of millions of desktops, laptops, notebooks, and tablets made by the organization are claimed to be vulnerable.
“Dell dbutil_2_3.sys driver is made up of an inadequate entry regulate vulnerability which may possibly direct to escalation of privileges, denial-of-company, or info disclosure. Regional authenticated user obtain is essential,” Dell stated in an advisory.
All 5 independent flaws have been assigned the CVE identifier CVE-2021-21551 with a CVSS score of 8.8. A breakdown of the shortcomings is as follows –
- CVE-2021-21551: Area Elevation Of Privileges #1 – Memory corruption
- CVE-2021-21551: Nearby Elevation Of Privileges #2 – Memory corruption
- CVE-2021-21551: Local Elevation Of Privileges #3 – Absence of input validation
- CVE-2021-21551: Community Elevation Of Privileges #4 – Deficiency of input validation
- CVE-2021-21551: Denial Of Service – Code logic issue
“The substantial severity flaws could allow any user on the pc, even without having privileges, to escalate their privileges and run code in kernel method,” SentinelOne Senior Security Researcher Kasif Dekel noted in a Tuesday assessment. “Among the evident abuses of such vulnerabilities are that they could be utilized to bypass security merchandise.”
Because these are area privilege escalation bugs, they are unlikely to be exploited remotely over the internet. To carry out an attack, an adversary will want to have obtained obtain to a non-administrator account on a susceptible technique, subsequent which the driver vulnerability can be abused to get neighborhood elevation of privilege. Armed with this entry, the attacker can then leverage other techniques to execute arbitrary code and laterally transfer across an organization’s network.
Though no proof of in-the-wild abuse has been detected, SentinelOne stated it plans to release the evidence-of-strategy (PoC) code on June 1, 2021, supplying Dell shoppers enough time to remediate the vulnerability.
SentinelOne’s disclosure is the 3rd time the same issue has been reported to Dell in excess of the very last two many years, according to Crowdtrike’s Chief Architect Alex Ionescu, 1st by the Sunnyvale-based cybersecurity company in 2019 and all over again by IOActive. Dell also credited Scott Noone of OSR Open up Programs Sources with reporting the vulnerability.
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