USN-4167-2: Samba vulnerabilities

Releases

• Ubuntu 14.04 ESM
• Ubuntu 12.04

Packages

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

Details

USN-4167-1 fixed several vulnerabilities in Samba. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

Michael Hanselmann discovered that the Samba client code incorrectly
handled path separators. If a user were tricked into connecting to a
malicious server, a remote attacker could use this issue to cause the
client to access local pathnames instead of network pathnames.
(CVE-2019-10218)

Adam Xu discovered that Samba incorrectly handled the dirsync LDAP control.
A remote attacker with "get changes" permissions could possibly use this
issue to cause Samba to crash, resulting in a denial of service. This issue
only affected Ubuntu 14.04 ESM. (CVE-2019-14847)

Update instructions

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

Ubuntu 14.04

• samba - 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm3
• libsmbclient - 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm3

Ubuntu 12.04

• samba - 2:3.6.25-0ubuntu0.12.04.19
• libsmbclient - 2:3.6.25-0ubuntu0.12.04.19

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

References

• CVE-2019-10218
• CVE-2019-14847

Related notices

• USN-4167-1: libpam-winbind, python-samba, libwbclient0, python3-samba, registry-tools, samba-common, libsmbclient, winbind, samba-libs, samba-dsdb-modules, smbclient, libnss-winbind, samba-common-bin, samba-dev, samba-vfs-modules, libwbclient-dev, libsmbclient-dev, ctdb, samba, samba-testsuite, libparse-pidl-perl