Vulnerability CVE-2019-15753


Published: 2019-08-28

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.

Type:

CWE-399

(Resource Management Errors)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.4/10
4.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
Partial
Affected software
Openstack -> Os-vif 

 References:
http://www.openwall.com/lists/oss-security/2019/08/29/2
https://launchpad.net/bugs/1837252
https://review.opendev.org/672834
https://review.opendev.org/678098
https://security.openstack.org/ossa/OSSA-2019-004.html

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