CVE Vulnerability

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.

3.6 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 4.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

Scope

7.1 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://www.openwall.com/lists/oss-security/2019/06/11/2 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2019/06/11/2 Mailing List Mitigation
https://usn.ubuntu.com/4015-1/ Third Party Advisory
https://usn.ubuntu.com/4015-2/
https://www.debian.org/security/2019/dsa-4462
https://seclists.org/bugtraq/2019/Jun/16
http://www.securityfocus.com/bid/108751
https://lists.debian.org/debian-lts-announce/2019/06/msg00005.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/V2CQF37O73VH2JDVX2ILX2KD2KLXLQOU/
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00059.html
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00092.html
https://access.redhat.com/errata/RHSA-2019:1726
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00026.html
https://security.gentoo.org/glsa/201909-08
https://access.redhat.com/errata/RHSA-2019:2870
https://access.redhat.com/errata/RHSA-2019:2868
https://access.redhat.com/errata/RHSA-2019:3707
Configurations

Configuration 1

cpe:2.3:a:freedesktop:dbus:*:*:*:*:*:*:*:*
cpe:2.3:a:freedesktop:dbus:*:*:*:*:*:*:*:*
cpe:2.3:a:freedesktop:dbus:*:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*
Information

Published : 2019-06-11 05:29

Updated : 2020-08-24 05:37

NVD link : CVE-2019-12749

Mitre link : CVE-2019-12749

Products Affected
No products.
CWE
CWE-59