DescriptionA flaw was found in sssd Group Policy Objects implementation. When the GPO is not readable by SSSD due to a too strict permission settings on the server side, SSSD will allow all authenticated users to login instead of denying access.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium
Debian Bugs931432

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
sssd (PTS)stretch1.15.0-3+deb9u1vulnerable
stretch (security)1.15.0-3+deb9u2vulnerable
bookworm, sid2.5.2-4fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
sssdsourcejessie(not affected)


[buster] - sssd <no-dsa> (Minor issue)
[stretch] - sssd <no-dsa> (Minor issue)
[jessie] - sssd <not-affected> (GPO based access control introduced later)
GPO based access control introduced in
seems to presuppose configuration mistake: if sssd is not given enough permissions
to read GPO, access is systematically granted instead of denied

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