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CVE-2019-15753

9.1 · CRITICAL

In OpenStack os-vif 1.15.x before 1.15.2, and 1.16.0, a hard-coded MAC aging time of 0 disables MAC learning in linuxbridge, forcing obligatory Ethernet flooding of non-local destinations, which bo…

Published Aug 28, 2019CWE-770EPSS 2.61%

Overview

CVE-2019-15753 is a critical-severity vulnerability. It was published on August 28, 2019 and has a CVSS 3.0 base score of 9.1 (CRITICAL).

This vulnerability has a CVSS 3.0 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In OpenStack os-vif 1.15.x before 1.15.2, and 1.16.0, a hard-coded MAC aging time of 0 disables MAC learning in linuxbridge, forcing obligatory Ethernet flooding of non-local destinations, which both impedes network performance and allows users to possibly view the content of packets for instances belonging to other tenants sharing the same network. Only deployments using the linuxbridge backend are affected. This occurs in PyRoute2.add() in internal/command/ip/linux/impl_pyroute2.py.

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

Refwww.openwall.com/lists/oss-security/2019/08/29/2Reflaunchpad.net/bugs/1837252Refreview.opendev.org/672834Refreview.opendev.org/678098Refsecurity.openstack.org/ossa/OSSA-2019-004.htmlRefwww.openwall.com/lists/oss-security/2019/08/29/2Reflaunchpad.net/bugs/1837252Refreview.opendev.org/672834Refreview.opendev.org/678098Refsecurity.openstack.org/ossa/OSSA-2019-004.html

How CyberStrike helps

Frequently asked questions

What is CVE-2019-15753?

CVE-2019-15753 is a critical-severity vulnerability. It was published on August 28, 2019 and has a CVSS 3.0 base score of 9.1 (CRITICAL).

How severe is CVE-2019-15753?

This vulnerability has a CVSS 3.0 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2019-15753?

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-2019-15753?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-15753 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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