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AUSCERT External Security Bulletin Redistribution
ESB-2019.4015
USN-4167-2: Samba vulnerabilities
30 October 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 -- Existing Account
Provide Misleading Information -- Remote with User Interaction
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-14847 CVE-2019-14833 CVE-2019-10218
Original Bulletin:
https://usn.ubuntu.com/4167-2/
https://usn.ubuntu.com/4167-1/
Comment: This bulletin contains two (2) Ubuntu security advisories.
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USN-4167-2: Samba vulnerabilities
29 October 2019
samba vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 14.04 ESM
o Ubuntu 12.04 ESM
Summary
Several security issues were fixed in Samba.
Software Description
o 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
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 USN-4167-1
o CVE-2019-10218
o CVE-2019-14847
- ---
USN-4167-1: Samba vulnerabilities
29 October 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
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)
Simon Fonteneau and BjArn Baumbach discovered that Samba incorrectly handled
the check password script. This issue could possibly bypass custom password
complexity checks, contrary to expectations. This issue only affected Ubuntu
18.04 LTS, Ubuntu 19.04, and Ubuntu 19.10. (CVE-2019-14833)
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. (CVE-2019-14847)
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-0ubuntu2.2
samba - 2:4.10.7+dfsg-0ubuntu2.2
Ubuntu 19.04
libsmbclient - 2:4.10.0+dfsg-0ubuntu2.6
samba - 2:4.10.0+dfsg-0ubuntu2.6
Ubuntu 18.04 LTS
libsmbclient - 2:4.7.6+dfsg~ubuntu-0ubuntu2.13
samba - 2:4.7.6+dfsg~ubuntu-0ubuntu2.13
Ubuntu 16.04 LTS
libsmbclient - 2:4.3.11+dfsg-0ubuntu0.16.04.23
samba - 2:4.3.11+dfsg-0ubuntu0.16.04.23
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-2019-10218
o CVE-2019-14833
o CVE-2019-14847
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