CVE-2021-21557 Memory corruption in PowerEdge BIOS Intel 15G
A local high-privilege attacker can exploit an out-of-bounds array access in Dell PowerEdge BIOS to cause denial of service, execute arbitrary code, or disclose information.
- 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-2021-21557?
CVE-2021-21557 is a high-severity memory corruption vulnerability in Dell PowerEdge BIOS Intel 15G, published on 14 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Dell PowerEdge Server BIOS and select Dell Precision Rack BIOS contain an out-of-bounds array access vulnerability. A local malicious user with high privileges may potentially exploit this vulnerability, leading to a denial of service, arbitrary code execution, or information disclosure in System Management Mode.
Which versions are affected by CVE-2021-21557?
It affects 31 products.
Products include Dell Poweredge C4140 Firmware, Dell Poweredge C6420 Firmware, Dell Poweredge C6525 Firmware, Dell Poweredge Fc640 Firmware, Dell Poweredge M640 Firmware, Dell Poweredge M640p Firmware and 25 more.
How do I fix CVE-2021-21557?
No fix has been published for CVE-2021-21557 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-2021-21557 being exploited?
There is no known exploitation of CVE-2021-21557 in the wild and no public exploit code.
Sources
Also known as GHSA-66g6-48gr-pwpc.