CVE Vulnerability

CVE-2018-17204

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.

4 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

4.3 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References
Link Resource
https://github.com/openvswitch/ovs/commit/4af6da3b275b764b1afe194df6499b33d2bf4cde Patch Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3500 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0081 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0053 Third Party Advisory
https://usn.ubuntu.com/3873-1/ Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00032.html Mailing List Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openstack:13:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Information

Published : 2018-09-19 04:29

Updated : 2021-08-04 05:14

NVD link : CVE-2018-17204

Mitre link : CVE-2018-17204

Products Affected
No products.
CWE
CWE-617