CVE-2026-55167
CVE-2026-55167 · LDAP Account Manager: WebAuthn authentication challenge is kept in the PHP session
This page contains facts from public vulnerability sources. Check the original advisory before updating.
LDAP Account Manager (LAM) is a webfrontend for managing entries (e.g. users, groups, DHCP settings) stored in an LDAP directory. Prior to 9.6, installations with WebAuthn two-factor authentication leave the challenge in the same PHP session after the authentication response is processed. A user who has already completed valid password authentication can therefore retain the same signed WebAuthn ceremony state instead of consuming it once. The practical risk is limited by the requirement for a valid password, the same PHP session, and a valid authenticator signature. This issue is fixed in version 9.6.
CVSS 4.2 · Medium · EPSS 0.2% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
lam
- Versions
- < 9.6: Affected
No fix published
ldap-account-manager Debian:12
- Versions
- 8.3-1
- 8.5-1
- 8.6-1
- 8.7-1
- 9.0-1
- 9.5.1-1
- 9.6-1
- 9.7-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
ldap-account-manager Debian:13
- Versions
- 9.0-1
- 9.5.1-1
- 9.6-1
- 9.7-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
ldap-account-manager Debian:14
- Versions
- 9.0-1
- 9.5.1-1
- Affected ranges
- ECOSYSTEM: < 9.6-1
Update to 9.6-1
ldap-account-manager Ubuntu:16.04:LTS
- Versions
- 4.9-1
- 5.1-1
- 5.2-1
- 5.2-1ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
ldap-account-manager Ubuntu:18.04:LTS
- Versions
- 5.7-1
- 6.1-1
- 6.2-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
ldap-account-manager Ubuntu:20.04:LTS
- Versions
- 6.7-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
ldap-account-manager Ubuntu:22.04:LTS
- Versions
- 7.5-1
- 7.7-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
ldap-account-manager Ubuntu:24.04:LTS
- Versions
- 8.3-1
- 8.5-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
ldap-account-manager Ubuntu:26.04:LTS
- Versions
- 9.0-1
- 9.0-1build1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published