Description
scheme/webauthn.c in Glewlwyd SSO server through 2.5.3 has a buffer overflow during FIDO2 signature validation in webauthn registration.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 13 | glewlwyd | 2.5.2-3 | — |
| Debian 12 | glewlwyd | 2.5.2-3 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | glewlwyd | No fix yet | — |
| Ubuntu 20.04 LTS | glewlwyd | No fix yet | — |
| Ubuntu 18.04 LTS | glewlwyd | No fix yet | — |