CVE-2020-25719

NameCVE-2020-25719
DescriptionA flaw was found in the way Samba, as an Active Directory Domain Controller, implemented Kerberos name-based authentication. The Samba AD DC, could become confused about the user a ticket represents if it did not strictly require a Kerberos PAC and always use the SIDs found within. The result could include total domain compromise.
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)
ReferencesDSA-5003-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
samba (PTS)stretch2:4.5.16+dfsg-1+deb9u2vulnerable
stretch (security)2:4.5.16+dfsg-1+deb9u4vulnerable
buster, buster (security)2:4.9.5+dfsg-5+deb10u3vulnerable
bullseye (security), bullseye2:4.13.13+dfsg-1~deb11u3fixed
bookworm, sid2:4.16.1+dfsg-4fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
sambasourcebullseye2:4.13.13+dfsg-1~deb11u2DSA-5003-1
sambasource(unstable)2:4.13.14+dfsg-1

Notes

[buster] - samba <ignored> (Intrusive backport; affects Samba as AD DC)
https://bugzilla.samba.org/show_bug.cgi?id=14561
https://bugzilla.samba.org/show_bug.cgi?id=14725
https://www.samba.org/samba/security/CVE-2020-25719.html

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