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.

CVSS v3.0 9.1 CRITICAL
CVSS v2.0 6.4 MEDIUM

9.1^/10

CVSS v3.0 : CRITICAL

Vector : AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

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

6.4^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:P/I:N/A:P

Exploitability : 10.0 / Impact : 4.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact PARTIAL

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 Third Party Advisory

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Configurations

Configuration 1 (hide)

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

Information

Published : 2019-08-28 14:15

Updated : 2020-08-24 10:37

NVD link : CVE-2019-15753

Mitre link : CVE-2019-15753

JSON object : View

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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Products Affected

openstack

os-vif

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