CVE-2019-12749

CVE Details

Release Date:

2019-06-11

Description

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.

See more information about CVE-2019-12749 from MITRE CVE dictionary and NIST NVD

CVSS v3.0 metrics

NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.

Base Score:	7.1	Base Metrics:	AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Access Vector:	Local network	Attack Complexity:	Low
Privileges Required:	Low	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	High
Integrity Impact:	High	Availability Impact:	None

Errata information

Platform	Errata	Release Date
Oracle Linux version 6 (dbus)	ELSA-2019-1726	2019-07-10
Oracle Linux version 7 (dbus)	ELSA-2020-4032	2020-10-06
Oracle Linux version 8 (dbus)	ELSA-2019-3707	2019-11-14
Oracle VM version 3.3 (dbus)	OVMSA-2019-0034	2019-07-10
Oracle VM version 3.4 (dbus)	OVMSA-2019-0034	2019-07-10

This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team