Alibaba Cloud Linux 3 : 0097: dbus (ALINUX3-SA-2022:0097)

high Nessus Plugin ID 236444

Synopsis

The remote Alibaba Cloud Linux host is missing one or more security updates.

Description

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2022:0097 advisory.

Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

CVE-2019-12749:
dbus before 1.10.28, 1.12.x before 1.12.16, and 1.13.x before 1.13.12, as used in DBusServer in Canonical Upstart in Ubuntu 14.04 (and in some, less common, uses of dbus-daemon), allows cookie spoofing because of symlink mishandling in the reference implementation of DBUS_COOKIE_SHA1 in the libdbus library. (This only affects the DBUS_COOKIE_SHA1 authentication mechanism.) A malicious client with write access to its own home directory could manipulate a ~/.dbus-keyrings symlink to cause a DBusServer with a different uid to read and write in unintended locations. In the worst case, this could result in the DBusServer reusing a cookie that is known to the malicious client, and treating that cookie as evidence that a subsequent client connection came from an attacker-chosen uid, allowing authentication bypass.

CVE-2020-12049:
An issue was discovered in dbus >= 1.3.0 before 1.12.18. The DBusServer in libdbus, as used in dbus- daemon, leaks file descriptors when a message exceeds the per-message file descriptor limit. A local attacker with access to the D-Bus system bus or another system service's private AF_UNIX socket could use this to make the system service reach its file descriptor limit, denying service to subsequent D-Bus clients.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

Plugin Details

Severity: High

ID: 236444

File Name: alinux3_sa_2022-0097.nasl

Version: 1.1

Type: local

Family: Alibaba Cloud Linux Local Security Checks

Published: 5/14/2025

Updated: 5/14/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: Low

Base Score: 3.6

Temporal Score: 2.8

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

CVSS Score Source: CVE-2019-12749

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.4

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:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:alibabacloud:alibaba_cloud_linux_3, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:dbus-daemon-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:dbus-devel, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:dbus-libs-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:dbus-tools, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:dbus-x11, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:dbus, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:dbus-common, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:dbus-tools-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:dbus-debugsource, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:dbus-daemon, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:dbus-x11-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:dbus-tests, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:dbus-tests-debuginfo, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:dbus-libs, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:dbus-debuginfo

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/Alibaba/release, Host/Alibaba/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/28/2021

Vulnerability Publication Date: 6/11/2019

Reference Information

CVE: CVE-2019-12749, CVE-2020-12049

Detections

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