| Description |
This update addresses the following issue:
* dbus as used in DBusServer 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-2019-12749) |
