CVE-2021-21571 Security feature bypass in UEFI BIOS https stack
Remote attackers can bypass certificate validation in Dell BIOS HTTPS features via MITM, causing denial of service and payload tampering.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-21571?
CVE-2021-21571 is a medium-severity vulnerability in Dell Chengming 3990 Firmware, published on 24 Jun 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
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.
Weakness: CWE-295
Which versions are affected by CVE-2021-21571?
It affects 128 products.
Products include Dell Alienware M15 R6 Firmware, Dell Chengming 3990 Firmware, Dell Chengming 3991 Firmware, Dell G15 5510 Firmware, Dell G15 5511 Firmware, Dell G3 3500 Firmware and 122 more.
How do I fix CVE-2021-21571?
No fix has been published for CVE-2021-21571 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-21571 being exploited?
There is no known exploitation of CVE-2021-21571 in the wild and no public exploit code.
Other vulnerabilities in Dell Chengming 3990 Firmware
Sources
Also known as GHSA-g784-x97g-r6ww.