Vulnerability Monitor

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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.

Published

2019-08-28T21:15:10.943

Last Modified

2024-11-21T04:29:24.520

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 9.1 (CRITICAL)

CVSSv2 Vector

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

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

4.9

Weaknesses

Type: Primary
CWE-770

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	openstack	os-vif	< 1.15.2	Yes
Application	openstack	os-vif	1.16.0	Yes

References

http://www.openwall.com/lists/oss-security/2019/08/29/2 Mailing List, Patch, Third Party Advisory ([email protected])
https://launchpad.net/bugs/1837252 Issue Tracking, Third Party Advisory ([email protected])
https://review.opendev.org/672834 Patch ([email protected])
https://review.opendev.org/678098 Patch ([email protected])
https://security.openstack.org/ossa/OSSA-2019-004.html Patch, Vendor Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2019/08/29/2 Mailing List, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://launchpad.net/bugs/1837252 Issue Tracking, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://review.opendev.org/672834 Patch (af854a3a-2127-422b-91ae-364da2661108)
https://review.opendev.org/678098 Patch (af854a3a-2127-422b-91ae-364da2661108)
https://security.openstack.org/ossa/OSSA-2019-004.html Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)