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AUSCERT External Security Bulletin Redistribution
ESB-2019.4604
USN-4217-1: Samba vulnerabilities
11 December 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Samba
Publisher: Ubuntu
Operating System: Ubuntu
Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Denial of Service -- Remote/Unauthenticated
Unauthorised Access -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-14870 CVE-2019-14861
Original Bulletin:
https://usn.ubuntu.com/4217-1/
Comment: This advisory references vulnerabilities in products which run on
platforms other than Ubuntu. It is recommended that administrators
running Samba check for an updated version of the software for their
operating system.
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USN-4217-1: Samba vulnerabilities
10 December 2019
samba vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 19.10
o Ubuntu 19.04
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Summary
Several security issues were fixed in Samba.
Software Description
o samba - SMB/CIFS file, print, and login server for Unix
Details
Andreas Oster discovered that the Samba DNS management server incorrectly
handled certain records. An authenticated attacker could possibly use this
issue to crash Samba, resulting in a denial of service. (CVE-2019-14861)
Isaac Boukris discovered that Samba did not enforce the Kerberos
DelegationNotAllowed feature restriction, contrary to expectations.
(CVE-2019-14870)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 19.10
libsmbclient - 2:4.10.7+dfsg-0ubuntu2.3
samba - 2:4.10.7+dfsg-0ubuntu2.3
Ubuntu 19.04
libsmbclient - 2:4.10.0+dfsg-0ubuntu2.7
samba - 2:4.10.0+dfsg-0ubuntu2.7
Ubuntu 18.04 LTS
libsmbclient - 2:4.7.6+dfsg~ubuntu-0ubuntu2.14
samba - 2:4.7.6+dfsg~ubuntu-0ubuntu2.14
Ubuntu 16.04 LTS
libsmbclient - 2:4.3.11+dfsg-0ubuntu0.16.04.24
samba - 2:4.3.11+dfsg-0ubuntu0.16.04.24
To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .
In general, a standard system update will make all the necessary changes.
References
o CVE-2019-14861
o CVE-2019-14870
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