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- Snyk ID SNYK-CENTOS8-DBUSLIBS-2018063
- published 26 Jul 2021
- disclosed 11 Jun 2019
Introduced: 11 Jun 2019CVE-2019-12749 Open this link in a new tab
How to fix?
dbus-libs to version 1:1.12.8-9.el8 or higher.
Note: Versions mentioned in the description apply only to the upstream
dbus-libs package and not the
dbus-libs package as distributed by
How to fix? for
Centos:8 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.