CVE-2018-17204

Advisory lineage Upstream: 0 Downstream: 9
Modified
Published: 19 Sept 2018, 16:00
Last modified:05 Aug 2024, 10:47

Vulnerability Summary

Overall Risk (default)
low
17/100
CVSS Score
4.3 MEDIUM
v3.1 (nvd)
EPSS Score
1.13% LOW
1% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

19 Sept 2018, 16:00
Published
Vulnerability first disclosed
05 Aug 2024, 10:47
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
  • v2.0•MEDIUM•Score: 4AV:N/AC:L/Au:S/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 1.13%• Percentile: 79%

Techniques & Countermeasures

  • CWE-617•Reachable Assertion

    The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.

Affected Systems

  • canonical•ubuntu_linux

    16.04 | 18.04

  • debian•debian_linux

    9.0

  • openvswitch•openvswitch

    ≥ 2.7.0, ≤ 2.7.6

  • redhat•openstack

    10 | 13

References (6)