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VAR-201908-0856

Vulnerability from variot - Updated: 2023-12-18 11:59

A vulnerability within the Endpoint Learning feature of Cisco Nexus 9000 Series Switches running in Application Centric Infrastructure (ACI) mode could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an endpoint device in certain circumstances. The vulnerability is due to improper endpoint learning when packets are received on a specific port from outside the ACI fabric and destined to an endpoint located on a border leaf when Disable Remote Endpoint Learning has been enabled. This can result in a Remote (XR) entry being created for the impacted endpoint that will become stale if the endpoint migrates to a different port or leaf switch. This results in traffic not reaching the impacted endpoint until the Remote entry can be relearned by another mechanism. Cisco Nexus 9000 Series switches have a state vulnerability.Service operation interruption (DoS) There is a possibility of being put into a state. NX-OS ACI Software is one of the operating systems used in Cisco network equipment. A remote attacker could exploit this vulnerability to cause a denial of service

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CVE-2019-1977 (GCVE-0-2019-1977)

Vulnerability from cvelistv5 – Published: 2019-08-29 21:50 – Updated: 2024-11-21 19:15

Title

Cisco Nexus 9000 Series Fabric Switches ACI Mode Border Leaf Endpoint Learning Vulnerability

Summary

Severity ?

6.8 (Medium)


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

CWE

CWE-371

Assigner

cisco

References

URL

Tags

https://tools.cisco.com/security/center/content/C…

vendor-advisoryx_refsource_CISCO

Impacted products

	Vendor	Product	Version
	Cisco	Cisco Nexus 9000 Series Fabric Switches in ACI	Affected: unspecified , < 12.2(4M) (custom)

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

VAR-201908-0856

CVE-2019-1977 (GCVE-0-2019-1977)

Tags

Sightings

Nomenclature