CVE-2021-36343 Memory corruption in CPG BIOS
A local attacker can exploit improper input validation in Dell BIOS to execute arbitrary code in SMRAM, requiring a firmware patch.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-36343?
CVE-2021-36343 is a high-severity memory corruption vulnerability in Dell Alienware Area 51m R2 Firmware, published on 24 Jan 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Dell BIOS contains an improper input validation vulnerability. A local authenticated malicious user may potentially exploit this vulnerability by using an SMI to gain arbitrary code execution in SMRAM.
Which versions are affected by CVE-2021-36343?
It affects 411 products.
Products include Dell Alienware 13 R3 Firmware, Dell Alienware 15 R3 Firmware, Dell Alienware 15 R4 Firmware, Dell Alienware 17 R4 Firmware, Dell Alienware 17 R5 Firmware, Dell Alienware Area 51m R1 Firmware and 405 more.
How do I fix CVE-2021-36343?
No fix has been published for CVE-2021-36343 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-36343 being exploited?
There is no known exploitation of CVE-2021-36343 in the wild and no public exploit code.
Other vulnerabilities in Dell Alienware Area 51m R2 Firmware
Sources
Also known as GHSA-r5q9-m2x7-ffq7.