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.
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:freedesktop:dbus:*:*:*:*:*:*:*:*
cpe:2.3:a:freedesktop:dbus:*:*:*:*:*:*:*:*
cpe:2.3:a:freedesktop:dbus:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*

History

No history.

Information

Published : 2019-06-11 17:29

Updated : 2024-02-04 20:20


NVD link : CVE-2019-12749

Mitre link : CVE-2019-12749

CVE.ORG link : CVE-2019-12749


JSON object : View

Products Affected

canonical

  • ubuntu_linux

freedesktop

  • dbus
CWE
CWE-59

Improper Link Resolution Before File Access ('Link Following')