Vulnerability · Published Jun 24, 2021 · Assigned by dell
CVE-2021-21571
Medium 5.9
In plain English
A medium-severity improper certificate validation in UEFI BIOS https stack from Dell. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 46% of all known vulnerabilities).
Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)0.5%top 54.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
Dell UEFI BIOS https stack leveraged by the Dell BIOSConnect feature and Dell HTTPS Boot feature contains an improper certificate validation vulnerability. A remote unauthenticated attacker may exploit this vulnerability using a person-in-the-middle attack which may lead to a denial of service and payload tampering.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Dell | UEFI BIOS https stack | Gen 11, Gen 10 |
Weakness: CWE-295 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:H
References
- https://www.dell.com/support/kbdoc/en-us/000188682 x_refsource_MISC