CVE-2021-40818

Description

scheme/webauthn.c in Glewlwyd SSO server through 2.5.3 has a buffer overflow during FIDO2 signature validation in webauthn registration.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.46%
Third-Party Advisory debian.org Third-Party Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/babelouest/glewlwyd/commit/0efd112bb62f566877750ad62ee828bff579b4e2 third party advisory patch
https://bugs.debian.org/993867 issue tracking mailing list third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-40818?
CVE-2021-40818 has been scored as a critical severity vulnerability.
How to fix CVE-2021-40818?
To fix CVE-2021-40818, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-40818 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-40818 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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