CVE-2022-27240
scheme/webauthn.c in Glewlwyd SSO server 2.x before 2.6.2 has a buffer overflow associated with a webauthn assertion.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
scheme/webauthn.c in Glewlwyd SSO server 2.x before 2.6.2 has a buffer overflow associated with a webauthn assertion.
- Record
CVE-2022-27240- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-120
- Updated
- 2026-11-02
CVE List No score
scheme/webauthn.c in Glewlwyd SSO server 2.x before 2.6.2 has a buffer overflow associated with a webauthn assertion.
- Record
CVE-2022-27240- Updated
- 2026-11-02
EUVDEUVD-2022-31749 No score
scheme/webauthn.c in Glewlwyd SSO server 2.x before 2.6.2 has a buffer overflow associated with a webauthn assertion.
- Record
EUVD-2022-31749- Updated
- 2026-11-03
OSVDEBIAN-CVE-2022-27240
scheme/webauthn.c in Glewlwyd SSO server 2.x before 2.6.2 has a buffer overflow associated with a webauthn assertion.
- Record
DEBIAN-CVE-2022-27240- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-03
OSVUBUNTU-CVE-2022-27240
scheme/webauthn.c in Glewlwyd SSO server 2.x before 2.6.2 has a buffer overflow associated with a webauthn assertion.
- Record
UBUNTU-CVE-2022-27240- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSV No score
scheme/webauthn.c in Glewlwyd SSO server 2.x before 2.6.2 has a buffer overflow associated with a webauthn assertion.
- Record
CVE-2022-27240- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
glewlwydDebian:12 |
before 2.6.1-2 | 2.6.1-2 |
glewlwydDebian:13 |
before 2.6.1-2 | 2.6.1-2 |
glewlwydUbuntu:18.04:LTS |
All versions, plus listed versions 1.1-2ubuntu11.2.2-11.3.1-1 |
None known |
glewlwydUbuntu:20.04:LTS |
All versions, plus listed versions 1.4.9-21.4.9-3 |
None known |
glewlwydUbuntu:22.04:LTS |
All versions, plus listed versions 2.5.2-32.6.1-12.6.1-1build1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2022-27240 is a critical vulnerability (CVSS 9.8) in Glewlwyd Sso Server Project Sso Server, published March 18, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.56%, the 75th percentile. Fixed in glewlwyd 2.6.1-2.
References
github.com/babelouest/glewlwyd/commit/4c5597c155bfbaf6491cf6b83479d241ae66940a
nvd.nist.gov/vuln/detail/CVE-2022-27240
security-tracker.debian.org/tracker/CVE-2022-27240
ubuntu.com/security/CVE-2022-27240
cve.org/CVERecord?id=CVE-2022-27240