Is CVE-2018-17205 in the CISA KEV catalog?

No. CVE-2018-17205 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-17205?

CVE-2018-17205 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2018-17205?

CVE-2018-17205 has an EPSS score of 2.53% (83th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-17205?

Upgrade openvswitch on debian 11 to 2.10.0+2018.08.28+git.8ca7c82b7d+ds1-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2018-17205

HIGHEPSS 83th pctl

7.5

CVSS v3

NVD

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.

CWE-617

How to fix

Remediation Available

openvswitchDebian

Fixed in:2.10.0+2018.08.28+git.8ca7c82b7d+ds1-1CVE-2018-17205

openvswitchUbuntu

Fixed in:2.5.5-0ubuntu0.16.04.2USN-3873-1

Fixed in:2.9.2-0ubuntu0.18.04.3USN-3873-1

openvswitch-commonUbuntu

Fixed in:2.5.5-0ubuntu0.16.04.2USN-3873-1

Fixed in:2.9.2-0ubuntu0.18.04.3USN-3873-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

2.53%probability of exploitation in 30 days

83rdpercentile

Elevated risk: more likely to be exploited than 83% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory4

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.