CVEvulnerability

CVE-2018-17204

4.3 MEDIUM Published 2018-09-19 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2018-09-19
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
4.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CVSS 2.0 ([email protected])
4.0 MEDIUM — AV:N/AC:L/Au:S/C:N/I:N/A:P
Weaknesses
CWE-617

Description

An issue was discovered in Open vSwitch (OvS) 2.7.x through 2.7.6, affecting parse_group_prop_ntr_selection_method in lib/ofp-util.c. When decoding a group mod, it validates the group type and command after the whole group mod has been decoded. The OF1.5 decoder, however, tries to use the type and command earlier, when it might still be invalid. This causes an assertion failure (via OVS_NOT_REACHED). ovs-vswitchd does not enable support for OpenFlow 1.5 by default.

Affected configurations

• openvswitch openvswitch (>= 2.7.0 <= 2.7.6) • redhat openstack 10 • redhat openstack 13 • canonical ubuntu linux 16.04 • canonical ubuntu linux 18.04 • debian debian linux 9.0

Related

Weakness · CWE (1)

  • CWE-617 Reachable Assertion weakness

References