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CVE-2019-12749

7.1 · HIGH

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 spoo…

Published Jun 11, 2019CWE-59EPSS 0.55%

Overview

CVE-2019-12749 is a high-severity vulnerability. It was published on June 11, 2019 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Reflists.opensuse.org/opensuse-security-announce/2019-06/msg00059.htmlReflists.opensuse.org/opensuse-security-announce/2019-06/msg00092.htmlReflists.opensuse.org/opensuse-security-announce/2019-07/msg00026.htmlRefwww.openwall.com/lists/oss-security/2019/06/11/2Refwww.securityfocus.com/bid/108751Refaccess.redhat.com/errata/RHSA-2019:1726Refaccess.redhat.com/errata/RHSA-2019:2868Refaccess.redhat.com/errata/RHSA-2019:2870Refaccess.redhat.com/errata/RHSA-2019:3707Reflists.debian.org/debian-lts-announce/2019/06/msg00005.html

How CyberStrike helps

Frequently asked questions

What is CVE-2019-12749?

CVE-2019-12749 is a high-severity vulnerability. It was published on June 11, 2019 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2019-12749?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2019-12749?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2019-12749?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-12749 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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