CVE-2019-3870

NameCVE-2019-3870
DescriptionA vulnerability was found in Samba from version (including) 4.9 to versions before 4.9.6 and 4.10.2. During the creation of a new Samba AD DC, files are created in a private subdirectory of the install location. This directory is typically mode 0700, that is owner (root) only access. However in some upgraded installations it will have other permissions, such as 0755, because this was the default before Samba 4.8. Within this directory, files are created with mode 0666, which is world-writable, including a sample krb5.conf, and the list of DNS names and servicePrincipalName values to update.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
samba (PTS)buster, buster (security)2:4.9.5+dfsg-5+deb10u3fixed
bullseye2:4.13.13+dfsg-1~deb11u4fixed
bullseye (security)2:4.13.13+dfsg-1~deb11u5fixed
bookworm, sid2:4.16.4+dfsg-2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
sambasourcejessie(not affected)
sambasourcestretch(not affected)
sambasource(unstable)2:4.9.5+dfsg-3

Notes

[stretch] - samba <not-affected> (Vulnerable code not present)
[jessie] - samba <not-affected> (Vulnerable code not present)
https://www.samba.org/samba/security/CVE-2019-3870.html

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