Debian DSA-4135-1 : samba - security update

high Nessus Plugin ID 108304

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Synopsis

The remote Debian host is missing a security-related update.

Description

Several vulnerabilities have been discovered in Samba, a SMB/CIFS file, print, and login server for Unix. The Common Vulnerabilities and Exposures project identifies the following issues :

- CVE-2018-1050 It was discovered that Samba is prone to a denial of service attack when the RPC spoolss service is configured to be run as an external daemon.

https://www.samba.org/samba/security/CVE-2018-1050.html

- CVE-2018-1057 Bjoern Baumbach from Sernet discovered that on Samba 4 AD DC the LDAP server incorrectly validates permissions to modify passwords over LDAP allowing authenticated users to change any other users passwords, including administrative users.

https://www.samba.org/samba/security/CVE-2018-1057.html

https://wiki.samba.org/index.php/CVE-2018-1057

Solution

Upgrade the samba packages.

For the oldstable distribution (jessie), CVE-2018-1050 will be addressed in a later update. Unfortunately the changes required to fix CVE-2018-1057 for Debian oldstable are too invasive to be backported.
Users using Samba as an AD-compatible domain controller are encouraged to apply the workaround described in the Samba wiki and upgrade to Debian stretch.

For the stable distribution (stretch), these problems have been fixed in version 2:4.5.12+dfsg-2+deb9u2.

Plugin Details

Severity: High

ID: 108304

File Name: debian_DSA-4135.nasl

Version: 1.6

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 3/14/2018

Updated: 11/13/2018

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:P

CVSS v3

Risk Factor: High

Base Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:samba, cpe:/o:debian:debian_linux:9.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Patch Publication Date: 3/13/2018

Reference Information

CVE: CVE-2018-1050, CVE-2018-1057

DSA: 4135

Detections

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