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USN-3976-1: Samba vulnerability

14 May 2019

Samba could allow unintended access to network services.

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Releases

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.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 19.04
Ubuntu 18.10
Ubuntu 18.04
Ubuntu 16.04

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

References

Related notices

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