CVE-2021-40818 Memory corruption in n/a
A buffer overflow in Glewlwyd SSO server allows attackers to execute arbitrary code or cause denial of service during FIDO2 registration.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-40818?
CVE-2021-40818 is a critical memory corruption vulnerability in n/a, published on 8 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
scheme/webauthn.c in Glewlwyd SSO server through 2.5.3 has a buffer overflow during FIDO2 signature validation in webauthn registration.
Weakness: CWE-120
Which versions are affected by CVE-2021-40818?
It affects 1 product.
Products include Glewlwyd Sso Server Project Glewlwyd Sso Server.
How do I fix CVE-2021-40818?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-40818 being exploited?
There is no known exploitation of CVE-2021-40818 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2021-40818, GHSA-ppv3-px64-q9mx, UBUNTU-CVE-2021-40818.