CVE-2019-15753
Published: 28 August 2019
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.
Notes
Author | Note |
---|---|
mdeslaur | code introduced in 1.15.0 |
Priority
Status
Package | Release | Status |
---|---|---|
python-os-vif Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(code not present)
|
disco |
Ignored
(end of life)
|
|
eoan |
Ignored
(end of life)
|
|
focal |
Needed
|
|
trusty |
Does not exist
|
|
upstream |
Released
(1.15.2)
|
|
xenial |
Does not exist
|
|
kinetic |
Ignored
(end of life, was needed)
|
|
hirsute |
Ignored
(end of life)
|
|
groovy |
Ignored
(end of life)
|
|
impish |
Ignored
(end of life)
|
|
jammy |
Needed
|
|
lunar |
Not vulnerable
(2.8.0-0ubuntu1)
|
|
mantic |
Not vulnerable
(2.8.0-0ubuntu1)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 9.1 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |