Description
System Security Services Daemon (SSSD) before 1.0.1, when the krb5 auth_provider is configured but the KDC is unreachable, allows physically proximate attackers to authenticate, via an arbitrary password, to the screen-locking program on a workstation that has any user's Kerberos ticket-granting ticket (TGT); and might allow remote attackers to bypass intended access restrictions via vectors involving an arbitrary password in conjunction with a valid TGT.
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 14 | sssd | 1.0.5-1 | — |
| Debian 13 | sssd | 1.0.5-1 | — |
| Debian 12 | sssd | 1.0.5-1 | — |
References
- 38160 third-party-advisory
- 37747 vdb-entry
- https://fedorahosted.org/sssd/wiki/Releases/Notes-1.0.1
- https://bugzilla.redhat.com/show_bug.cgi?id=553233