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USN-4454-2: Samba vulnerability

10 August 2020

Samba could be made to crash if it received specially crafted network traffic.



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


USN-4454-1 fixed a vulnerability in Samba. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

Martin von Wittich and Wilko Meyer discovered that Samba incorrectly
handled certain empty UDP packets when being used as a AD DC NBT server. A
remote attacker could possibly use this issue to cause Samba to crash,
resulting in a denial of service.

Update instructions

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

Ubuntu 14.04
Ubuntu 12.04

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


Related notices

  • USN-4454-1: samba-common-bin, libsmbclient-dev, samba-dsdb-modules, libwbclient-dev, samba-vfs-modules, libpam-winbind, registry-tools, libparse-pidl-perl, ctdb, libsmbclient, smbclient, winbind, samba, python3-samba, samba-libs, samba-dev, python-samba, libwbclient0, samba-common, samba-testsuite, libnss-winbind