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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.

Releases

Packages

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

Details

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.

References

Related notices

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