| Name | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 993867 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| glewlwyd (PTS) | buster | 1.4.9-1 | fixed |
| bullseye | 2.5.2-2+deb11u2 | fixed |
| bookworm | 2.7.5-3 | fixed |
| sid, trixie | 2.7.6+ds-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| glewlwyd | source | buster | (not affected) | | | |
| glewlwyd | source | bullseye | 2.5.2-2+deb11u1 | | | |
| glewlwyd | source | (unstable) | 2.5.2-3 | | | 993867 |
Notes
[buster] - glewlwyd <not-affected> (Vulnerable code for FIDO2 signature validation introduced later)
https://github.com/babelouest/glewlwyd/commit/0efd112bb62f566877750ad62ee828bff579b4e2