CVE-2018-17204
4.3
MEDIUM
CVSS 3.1
EPSS 1.1%
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.
How to fix CVE-2018-17204
To remediate CVE-2018-17204, upgrade the affected package to a fixed version below.
- —upgrade to 2.10.0+2018.08.28+git.8ca7c82b7d+ds1-1 or later
Is CVE-2018-17204 being exploited?
Low — EPSS is 1.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 2.10.0+2018.08.28+git.8ca7c82b7d+ds1-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |