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USN-4611-1: Samba vulnerabilities

2 November 2020

Several security issues were fixed in Samba.

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Releases

Packages

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

Details

Steven French discovered that Samba incorrectly handled ChangeNotify
permissions. A remote attacker could possibly use this issue to obtain file
name information. (CVE-2020-14318)

Bas Alberts discovered that Samba incorrectly handled certain winbind
requests. A remote attacker could possibly use this issue to cause winbind
to crash, resulting in a denial of service. (CVE-2020-14323)

Francis Brosnan Blázquez discovered that Samba incorrectly handled certain
invalid DNS records. A remote attacker could possibly use this issue to
cause the DNS server to crash, resulting in a denial of service.
(CVE-2020-14383)

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 20.10
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04

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

Related notices

  • USN-4931-1: libsmbsharemodes0, libnss-winbind, samba-doc, winbind, samba-dev, libsmbclient-dev, libparse-pidl-perl, libpam-winbind, python-samba, samba-common-bin, samba-libs, libwbclient-dev, smbclient, samba-testsuite, libsmbclient, samba-dsdb-modules, samba-vfs-modules, libpam-smbpass, samba, libwbclient0, libsmbsharemodes-dev, registry-tools, samba-common