Improper Input Validation Affecting python-openvswitch package, versions <0:2.9.0-83.el7fdp.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about Improper Input Validation vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-RHEL7-PYTHONOPENVSWITCH-5256767
- published1 Nov 2021
- disclosed25 Sept 2018
Introduced: 25 Sep 2018
CVE-2018-17205 (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 ofproto_rule_insert__ in ofproto/ofproto.c. During bundle commit, flows that are added in a bundle are applied to ofproto in order. If a flow cannot be added (e.g., the flow action is a go-to for a group id that does not exist), OvS tries to revert back all previous flows that were successfully applied from the same bundle. This is possible since OvS maintains list of old flows that were replaced by flows from the bundle. While reinserting old flows, OvS has an assertion failure due to a check on rule state != RULE_INITIALIZED. This would work for new flows, but for an old flow the rule state is RULE_REMOVED. The assertion failure causes an OvS crash.