Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Summary
Title Samba vulnerabilities
Informations
Name USN-3738-1 First vendor Publication 2018-08-14
Vendor Ubuntu Last vendor Modification 2018-08-14
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:S/C:P/I:P/A:P)
Cvss Base Score 6.5 Attack Range Network
Cvss Impact Score 6.4 Attack Complexity Low
Cvss Expoit Score 8 Authentication Requires single instance
Calculate full CVSS 2.0 Vectors scores

Detail

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in Samba.

Software Description: - 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 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:

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

Ubuntu 18.04 LTS:
libsmbclient 2:4.7.6+dfsg~ubuntu-0ubuntu2.2
samba 2:4.7.6+dfsg~ubuntu-0ubuntu2.2

Ubuntu 16.04 LTS:
libsmbclient 2:4.3.11+dfsg-0ubuntu0.16.04.15
samba 2:4.3.11+dfsg-0ubuntu0.16.04.15

Ubuntu 14.04 LTS:
libsmbclient 2:4.3.11+dfsg-0ubuntu0.14.04.16
samba 2:4.3.11+dfsg-0ubuntu0.14.04.16

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

References:
https://usn.ubuntu.com/usn/usn-3738-1
CVE-2018-10858, CVE-2018-10918, CVE-2018-10919, CVE-2018-1139

Package Information:
https://launchpad.net/ubuntu/+source/samba/2:4.7.6+dfsg~ubuntu-0ubuntu2.2
https://launchpad.net/ubuntu/+source/samba/2:4.3.11+dfsg-0ubuntu0.16.04.15
https://launchpad.net/ubuntu/+source/samba/2:4.3.11+dfsg-0ubuntu0.14.04.16

Original Source

Url : http://www.ubuntu.com/usn/USN-3738-1

CWE : Common Weakness Enumeration

% Id Name
25 % CWE-522 Insufficiently Protected Credentials (CWE/SANS Top 25)
25 % CWE-476 NULL Pointer Dereference
25 % CWE-200 Information Exposure
25 % CWE-119 Failure to Constrain Operations within the Bounds of a Memory Buffer

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 1
Application 1
Application 357
Os 3
Os 1
Os 1
Os 1
Os 1

Nessus® Vulnerability Scanner

Date Description
2019-01-03 Name : The remote Fedora host is missing one or more security updates.
File : fedora_2018-bc22d6c7bc.nasl - Type : ACT_GATHER_INFO
2018-12-20 Name : The remote Amazon Linux 2 host is missing a security update.
File : al2_ALAS-2018-1126.nasl - Type : ACT_GATHER_INFO
2018-12-17 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2018-3056.nasl - Type : ACT_GATHER_INFO
2018-08-22 Name : The remote Fedora host is missing a security update.
File : fedora_2018-8e4d871867.nasl - Type : ACT_GATHER_INFO
2018-08-20 Name : The remote Slackware host is missing a security update.
File : Slackware_SSA_2018-229-02.nasl - Type : ACT_GATHER_INFO
2018-08-15 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-4271.nasl - Type : ACT_GATHER_INFO
2018-08-15 Name : The remote FreeBSD host is missing one or more security-related updates.
File : freebsd_pkg_c4e9a4279fc211e8802a000c29a1e3ec.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
2
Date Informations
2018-11-01 17:21:39
  • Multiple Updates
2018-08-23 17:22:11
  • Multiple Updates
2018-08-14 21:19:22
  • First insertion