Severe vulnerabilities in Dell firmware update driver found and fixed - Ars Technica
May 05, 2021 42 secs

Yesterday, infosec research firm SentinelLabs revealed 12-year-old flaws in Dell's firmware updater, DBUtil 2.3.

The vulnerable firmware updater has been installed by default on hundreds of millions of Dell systems since 2009.

The five high-severity flaws SentinelLabs discovered and reported to Dell lurk in the dbutil_2_3.sys module, and they have been rounded up under a single CVE tracking number, CVE-2021-21551.

There are two memory-corruption issues and two lack of input validation issues, all of which can lead to local privilege escalation and a code logic issue, which could lead to a denial of service.

Since SentinelLabs notified Dell in December 2020, the company has provided documentation of the flaws and mitigation instructions which, for now, boil down to "remove the utility." A replacement driver is also available, and it should be automatically installed at the next firmware update check on affected Dell systems.

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