Debian DSA-4462-1 : dbus - security update

high Nessus Plugin ID 125905

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Synopsis

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

Description

Joe Vennix discovered an authentication bypass vulnerability in dbus, an asynchronous inter-process communication system. The implementation of the DBUS_COOKIE_SHA1 authentication mechanism was susceptible to a symbolic link attack. A local attacker could take advantage of this flaw to bypass authentication and connect to a DBusServer with elevated privileges.

The standard system and session dbus-daemons in their default configuration are not affected by this vulnerability.

The vulnerability was addressed by upgrading dbus to a new upstream version 1.10.28 which includes additional fixes.

Solution

Upgrade the dbus packages.

For the stable distribution (stretch), this problem has been fixed in version 1.10.28-0+deb9u1.

Plugin Details

Severity: High

ID: 125905

File Name: debian_DSA-4462.nasl

Version: 1.2

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 6/14/2019

Updated: 1/10/2020

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Low

Base Score: 3.6

Temporal Score: 2.7

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

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.2

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 6/13/2019

Vulnerability Publication Date: 6/11/2019

Reference Information

CVE: CVE-2019-12749

DSA: 4462

Detections

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