1. Ubuntu Security Notices
  2. USN-3738-1

USN-3738-1: Samba vulnerabilities

Publication date

14 August 2018

Overview

Several security issues were fixed in Samba.

Releases

Packages

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

Details

Svyatoslav Phirsov discovered that the Samba libsmbclient library
incorrectly handled extra long filenames. A malicious server could use this
issue to cause Samba to crash, resulting in a denial of service, or
possibly execute arbitrary code. (CVE-2018-10858)

Volker Mauel discovered that Samba incorrectly handled database output.
When used as an Active Directory Domain Controller, a remote authenticated
attacker could use this issue to cause Samba to crash, resulting in a
denial of service. This issue only affected Ubuntu 18.04 LTS.
(CVE-2018-10918)

Phillip Kuhrt discovered that the Samba LDAP server incorrectly handled
certain confidential attribute values. A remote authenticated attacker
could possibly use this issue to obtain certain sensitive information.
(CVE-2018-10919)

Vivek Das discovered that...

Svyatoslav Phirsov discovered that the Samba libsmbclient library
incorrectly handled extra long filenames. A malicious server could use this
issue to cause Samba to crash, resulting in a denial of service, or
possibly execute arbitrary code. (CVE-2018-10858)

Volker Mauel discovered that Samba incorrectly handled database output.
When used as an Active Directory Domain Controller, a remote authenticated
attacker could use this issue to cause Samba to crash, resulting in a
denial of service. This issue only affected Ubuntu 18.04 LTS.
(CVE-2018-10918)

Phillip Kuhrt discovered that the Samba LDAP server incorrectly handled
certain confidential attribute values. A remote authenticated attacker
could possibly use this issue to obtain certain sensitive information.
(CVE-2018-10919)

Vivek Das discovered that Samba incorrectly handled NTLMv1 being explicitly
disabled on the server. A remote user could possibly be authenticated using
NTLMv1, contrary to expectations. This issue only affected Ubuntu 18.04
LTS. (CVE-2018-1139)

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
18.04 bionic libsmbclient –  2:4.7.6+dfsg~ubuntu-0ubuntu2.2
samba –  2:4.7.6+dfsg~ubuntu-0ubuntu2.2
16.04 xenial libsmbclient –  2:4.3.11+dfsg-0ubuntu0.16.04.15
samba –  2:4.3.11+dfsg-0ubuntu0.16.04.15
14.04 trusty libsmbclient –  2:4.3.11+dfsg-0ubuntu0.14.04.16
samba –  2:4.3.11+dfsg-0ubuntu0.14.04.16

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References

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