USN-3976-1: Samba vulnerability

Releases

• Ubuntu 19.04
• Ubuntu 18.10
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• samba - SMB/CIFS file, print, and login server for Unix

Details

Isaac Boukris and Andrew Bartlett discovered that Samba incorrectly checked
S4U2Self packets. In certain environments, a remote attacker could possibly
use this issue to escalate privileges.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 19.04

• samba - 2:4.10.0+dfsg-0ubuntu2.1

Ubuntu 18.10

• samba - 2:4.8.4+dfsg-2ubuntu2.4

Ubuntu 18.04

• samba - 2:4.7.6+dfsg~ubuntu-0ubuntu2.10

Ubuntu 16.04

• samba - 2:4.3.11+dfsg-0ubuntu0.16.04.20

In general, a standard system update will make all the necessary changes.

References

• CVE-2018-16860

Related notices

• USN-3976-2: libnss-winbind, libwbclient0, samba-libs, libpam-smbpass, libpam-winbind, samba-common, samba-tools, swat, samba-vfs-modules, libsmbclient-dev, samba-doc-pdf, smbclient, libparse-pidl-perl, samba-common-bin, samba-dsdb-modules, samba-testsuite, winbind, samba-dev, samba-doc, libsmbclient, libwbclient-dev, samba, python-samba, registry-tools, libsmbsharemodes0, libsmbsharemodes-dev
• USN-5675-1: libheimbase1-heimdal, heimdal-clients, libhcrypto4-heimdal, libgssapi3-heimdal, libhx509-5-heimdal, libkadm5clnt7-heimdal, libroken18-heimdal, heimdal-kdc, libasn1-8-heimdal, heimdal-servers, libkdc2-heimdal, libkadm5srv8-heimdal, libkafs0-heimdal, heimdal-clients-x, libwind0-heimdal, libotp0-heimdal, heimdal, heimdal-servers-x, libheimntlm0-heimdal, libhdb9-heimdal, libkrb5-26-heimdal, heimdal-kcm, heimdal-multidev, heimdal-docs, libsl0-heimdal, heimdal-dev