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Ubuntu Security Notice USN-4167-2
October 29, 2019
samba vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 14.04 ESM
- Ubuntu 12.04 ESM
Summary:
Several security issues were fixed in Samba.
Software Description:
- 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 ESM:
libsmbclient 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm3
samba 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm3
Ubuntu 12.04 ESM:
libsmbclient 2:3.6.25-0ubuntu0.12.04.19
samba 2:3.6.25-0ubuntu0.12.04.19
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/4167-2
https://usn.ubuntu.com/4167-1
CVE-2019-10218, CVE-2019-14847
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