UBUNTU-CVE-2018-17204

Advisory lineage Upstream: 1 Downstream: 1
Upstream
CVE-2018-17204
Downstream
USN-3873-1
Published: 19 Sept 2018, 00:00
Last modified:04 Feb 2026, 02:47

Vulnerability Summary

Overall Risk (default)
low
17/100
CVSS Score
4.3 MEDIUM
3.1 (osv_ubuntu)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

19 Sept 2018, 00:00
Published
Vulnerability first disclosed
04 Feb 2026, 02:47
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
  • v3.0•MEDIUM•Score: 4.3CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Affected Systems

  • ubuntu•openvswitch

    < 2.5.5-0ubuntu0.16.04.2 | < 2.9.2-0ubuntu0.18.04.3

References (3)