CVE-2018-17204
Last modified
CVE-2018-17204 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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. EPSS estimates a 1.91% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| 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 |
References
- https://access.redhat.com/errata/RHSA-2018:3500Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0053Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0081Third Party Advisory
- https://github.com/openvswitch/ovs/commit/4af6da3b275b764b1afe194df6499b33d2bf4cdePatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/02/msg00032.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/3873-1/Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3500Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0053Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0081Third Party Advisory
- https://github.com/openvswitch/ovs/commit/4af6da3b275b764b1afe194df6499b33d2bf4cdePatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/02/msg00032.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/3873-1/Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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