Improper Input Validation Affecting python-openvswitch package, versions <0:2.9.0-83.el7fdp.1


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.32% (71st percentile)

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  • Snyk IDSNYK-RHEL7-PYTHONOPENVSWITCH-5256766
  • published1 Nov 2021
  • disclosed25 Sept 2018

Introduced: 25 Sep 2018

CVE-2018-17204  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade RHEL:7 python-openvswitch to version 0:2.9.0-83.el7fdp.1 or higher.
This issue was patched in RHSA-2019:0081.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python-openvswitch package and not the python-openvswitch package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

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 Scores

version 3.1