CVE-2018-17205
Open vSwitch (OvS) Rule State Assertion Failure Denial of Service
Description
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.
INFO
Published Date :
Sept. 19, 2018, 4:29 p.m.
Last Modified :
Aug. 4, 2021, 5:14 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
Affected Products
The following products are affected by CVE-2018-17205
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2018-17205.
| URL | Resource |
|---|---|
| https://access.redhat.com/errata/RHSA-2018:3500 | Third Party Advisory |
| https://access.redhat.com/errata/RHSA-2019:0053 | Third Party Advisory |
| https://access.redhat.com/errata/RHSA-2019:0081 | Third Party Advisory |
| https://github.com/openvswitch/ovs/commit/0befd1f3745055c32940f5faf9559be6a14395e6 | Exploit Patch Third Party Advisory |
| https://usn.ubuntu.com/3873-1/ | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2018-17205 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2018-17205 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CPE Deprecation Remap by [email protected]
Aug. 04, 2021
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:redhat:openstack:13.0:*:*:*:*:*:*:* OR *cpe:2.3:a:redhat:openstack:13:*:*:*:*:*:*:* -
CPE Deprecation Remap by [email protected]
Oct. 15, 2020
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:o:redhat:virtualization:4.0:*:*:*:*:*:*:* OR *cpe:2.3:a:redhat:virtualization:4.0:*:*:*:*:*:*:* -
CWE Remap by [email protected]
Oct. 03, 2019
Action Type Old Value New Value Changed CWE CWE-20 CWE-20 CWE-617 -
Modified Analysis by [email protected]
Mar. 07, 2019
Action Type Old Value New Value Changed Reference Type https://usn.ubuntu.com/3873-1/ No Types Assigned https://usn.ubuntu.com/3873-1/ Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* -
CVE Modified by [email protected]
Jan. 31, 2019
Action Type Old Value New Value Added Reference https://usn.ubuntu.com/3873-1/ [No Types Assigned] -
Initial Analysis by [email protected]
Jan. 29, 2019
Action Type Old Value New Value Added CVSS V2 (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://access.redhat.com/errata/RHSA-2019:0053 No Types Assigned https://access.redhat.com/errata/RHSA-2019:0053 Third Party Advisory Changed Reference Type https://github.com/openvswitch/ovs/commit/0befd1f3745055c32940f5faf9559be6a14395e6 No Types Assigned https://github.com/openvswitch/ovs/commit/0befd1f3745055c32940f5faf9559be6a14395e6 Exploit, Patch, Third Party Advisory Changed Reference Type https://access.redhat.com/errata/RHSA-2019:0081 No Types Assigned https://access.redhat.com/errata/RHSA-2019:0081 Third Party Advisory Changed Reference Type https://access.redhat.com/errata/RHSA-2018:3500 No Types Assigned https://access.redhat.com/errata/RHSA-2018:3500 Third Party Advisory Added CWE CWE-20 Added CPE Configuration OR *cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* versions from (including) 2.7.0 up to (including) 2.7.6 Added CPE Configuration OR *cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openstack:13.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:virtualization:4.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jan. 17, 2019
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2019:0081 [No Types Assigned] Added Reference https://access.redhat.com/errata/RHSA-2019:0053 [No Types Assigned] -
CVE Modified by [email protected]
Nov. 06, 2018
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2018:3500 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2018-17205 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2018-17205
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.33 }} -0.14%
score
0.71383
percentile