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Improper Authentication Affecting dbus package, versions <1:1.10.24-15.el7

Severity

 Recommended
medium

Based on CentOS security rating.

Threat Intelligence

EPSS
0.08% (36th percentile)

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  • Snyk IDSNYK-CENTOS7-DBUS-2171765
  • published26 Jul 2021
  • disclosed11 Jun 2019
Report a new vulnerability Found a mistake?

Introduced: 11 Jun 2019

CVE-2019-12749  (opens in a new tab)
CWE-287  (opens in a new tab)

How to fix?

Upgrade Centos:7 dbus to version 1:1.10.24-15.el7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream dbus package and not the dbus package as distributed by Centos. See How to fix? for Centos:7 relevant fixed versions and status.

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.

References