CVE Vulnerability

CVE-2019-15753

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.

6.4 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 4.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact PARTIAL

Scope

9.1 /10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://launchpad.net/bugs/1837252 Issue Tracking Third Party Advisory
https://review.opendev.org/672834 Patch
https://review.opendev.org/678098 Patch
https://security.openstack.org/ossa/OSSA-2019-004.html Patch Vendor Advisory
http://www.openwall.com/lists/oss-security/2019/08/29/2 Mailing List Patch
Configurations

Configuration 1

cpe:2.3:a:openstack:os-vif:*:*:*:*:*:*:*:*
cpe:2.3:a:openstack:os-vif:1.16.0:*:*:*:*:*:*:*
Information

Published : 2019-08-28 09:15

Updated : 2020-08-24 05:37

NVD link : CVE-2019-15753

Mitre link : CVE-2019-15753

Products Affected
No products.
CWE
CWE-770