CVE-2021-27433 ARM mbed-ualloc memory library Integer Overflow or Wraparound
An integer overflow in the ARM mbed-ualloc library allows attackers to trigger arbitrary memory allocation, potentially leading to remote code execution or crashes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-27433?
CVE-2021-27433 is a high-severity vulnerability in ARM mbed-ualloc memory library, published on 3 May 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
ARM mbed-ualloc memory library version 1.3.0 is vulnerable to integer wrap-around in function mbed_krbs, which can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.
Weakness: CWE-190
Which versions are affected by CVE-2021-27433?
It affects 1 product.
Products include Arm Mbed Ualloc.
How do I fix CVE-2021-27433?
No fix has been published for CVE-2021-27433 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-27433 being exploited?
There is no known exploitation of CVE-2021-27433 in the wild and no public exploit code.
Sources
Also known as GHSA-5r3j-39g2-55xr.