CVE-2018-16857

NameCVE-2018-16857
DescriptionSamba from version 4.9.0 and before version 4.9.3 that have AD DC configurations watching for bad passwords (to restrict brute forcing of passwords) in a window of more than 3 minutes may not watch for bad passwords at all. The primary risk from this issue is with regards to domains that have been upgraded from Samba 4.8 and earlier. In these cases the manual testing done to confirm an organisation's password policies apply as expected may not have been re-done after the upgrade.
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 (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
samba (PTS)jessie2:4.2.14+dfsg-0+deb8u9fixed
jessie (security)2:4.2.14+dfsg-0+deb8u13fixed
stretch2:4.5.16+dfsg-1+deb9u1fixed
stretch (security)2:4.5.16+dfsg-1+deb9u2fixed
buster, sid2:4.9.5+dfsg-4fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
sambasource(unstable)2:4.9.2+dfsg-2medium
sambasourcejessie(not affected)
sambasourcestretch(not affected)

Notes

[stretch] - samba <not-affected> (Vulnerable code not present)
[jessie] - samba <not-affected> (Vulnerable code not present)
https://www.samba.org/samba/security/CVE-2018-16857.html

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