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Vulnerability Details : 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.
Publish Date : 2019-06-11 Last Update Date : 2019-06-14
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- CVSS Scores & Vulnerability Types

CVSS Score
3.6
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact None (There is no impact to the availability of the system.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Bypass a restriction or similar
CWE ID 287

- Products Affected By CVE-2019-12749

# Product Type Vendor Product Version Update Edition Language
1 OS Canonical Ubuntu Linux 16.04 ~~lts~~~ Version Details Vulnerabilities
2 OS Canonical Ubuntu Linux 18.04 ~~lts~~~ Version Details Vulnerabilities
3 OS Canonical Ubuntu Linux 18.10 Version Details Vulnerabilities
4 OS Canonical Ubuntu Linux 19.04 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Canonical Ubuntu Linux 4

- References For CVE-2019-12749

https://usn.ubuntu.com/4015-2/
UBUNTU USN-4015-2
https://lists.fedoraproject.org/archives/list/[email protected]/message/V2CQF37O73VH2JDVX2ILX2KD2KLXLQOU/
FEDORA FEDORA-2019-d5ded5326b
https://www.debian.org/security/2019/dsa-4462
DEBIAN DSA-4462
https://usn.ubuntu.com/4015-1/
UBUNTU USN-4015-1
https://seclists.org/bugtraq/2019/Jun/16
BUGTRAQ 20190613 [SECURITY] [DSA 4462-1] dbus security update
https://lists.debian.org/debian-lts-announce/2019/06/msg00005.html
MLIST [debian-lts-announce] 20190614 [SECURITY] [DLA 1818-1] dbus security update
http://www.securityfocus.com/bid/108751
BID 108751 Dbus CVE-2019-12749 Authentication Bypass Vulnerability Release Date:2019-06-11
http://www.openwall.com/lists/oss-security/2019/06/11/2
MLIST [oss-security] 20190611 CVE-2019-12749: DBusServer DBUS_COOKIE_SHA1 authentication bypass

- Metasploit Modules Related To CVE-2019-12749

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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