CVE-2021-43399 Memory corruption in n/a
Improper length validation in the YubiHSM2 library allows attackers to trigger memory corruption via crafted SSH signing requests or data operations.
- 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-2021-43399?
CVE-2021-43399 is a high-severity memory corruption vulnerability in n/a, published on 8 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Yubico YubiHSM YubiHSM2 library 2021.08, included in the yubihsm-shell project, does not properly validate the length of some operations including SSH signing requests, and some data operations received from a YubiHSM 2 device.
Weakness: CWE-787
Which versions are affected by CVE-2021-43399?
It affects 1 product.
Products include Yubico Yubihsm 2 Software Development Kit.
How do I fix CVE-2021-43399?
No fix has been published for CVE-2021-43399 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-2021-43399 being exploited?
There is no known exploitation of CVE-2021-43399 in the wild and no public exploit code.
Sources
Also known as GHSA-vrp3-rwcp-4q77.