CVE-2019-1977
Summary
| CVE | CVE-2019-1977 |
|---|---|
| State | PUBLIC |
| Assigner | [email protected] |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2019-08-30 09:15:00 UTC |
| Updated | 2019-10-09 23:48:00 UTC |
| Description | 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. |
Risk And Classification
Problem Types: CWE-371
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Hardware | Cisco | Nexus 9000 | - | All | All | All |
| Hardware | Cisco | Nexus 9000 | - | All | All | All |
| Hardware | Cisco | Nexus 93108tc-ex | - | All | All | All |
| Hardware | Cisco | Nexus 93108tc-ex | - | All | All | All |
| Hardware | Cisco | Nexus 93108tc-fx | - | All | All | All |
| Hardware | Cisco | Nexus 93108tc-fx | - | All | All | All |
| Hardware | Cisco | Nexus 93120tx | - | All | All | All |
| Hardware | Cisco | Nexus 93120tx | - | All | All | All |
| Hardware | Cisco | Nexus 93128tx | - | All | All | All |
| Hardware | Cisco | Nexus 93128tx | - | All | All | All |
| Hardware | Cisco | Nexus 93180lc-ex | - | All | All | All |
| Hardware | Cisco | Nexus 93180lc-ex | - | All | All | All |
| Hardware | Cisco | Nexus 93180yc-ex | - | All | All | All |
| Hardware | Cisco | Nexus 93180yc-ex | - | All | All | All |
| Hardware | Cisco | Nexus 93180yc-fx | - | All | All | All |
| Hardware | Cisco | Nexus 93180yc-fx | - | All | All | All |
| Hardware | Cisco | Nexus 9332pq | - | All | All | All |
| Hardware | Cisco | Nexus 9332pq | - | All | All | All |
| Hardware | Cisco | Nexus 9336c-fx2 | - | All | All | All |
| Hardware | Cisco | Nexus 9336c-fx2 | - | All | All | All |
| Hardware | Cisco | Nexus 9336pq | - | All | All | All |
| Hardware | Cisco | Nexus 9336pq | - | All | All | All |
| Hardware | Cisco | Nexus 9348gc-fxp | - | All | All | All |
| Hardware | Cisco | Nexus 9348gc-fxp | - | All | All | All |
| Hardware | Cisco | Nexus 9364c | - | All | All | All |
| Hardware | Cisco | Nexus 9364c | - | All | All | All |
| Hardware | Cisco | Nexus 9372px | - | All | All | All |
| Hardware | Cisco | Nexus 9372px | - | All | All | All |
| Hardware | Cisco | Nexus 9372px-e | - | All | All | All |
| Hardware | Cisco | Nexus 9372px-e | - | All | All | All |
| Hardware | Cisco | Nexus 9372tx | - | All | All | All |
| Hardware | Cisco | Nexus 9372tx | - | All | All | All |
| Hardware | Cisco | Nexus 9372tx-e | - | All | All | All |
| Hardware | Cisco | Nexus 9372tx-e | - | All | All | All |
| Hardware | Cisco | Nexus 9396px | - | All | All | All |
| Hardware | Cisco | Nexus 9396px | - | All | All | All |
| Hardware | Cisco | Nexus 9396tx | - | All | All | All |
| Hardware | Cisco | Nexus 9396tx | - | All | All | All |
| Hardware | Cisco | Nexus 9504 | - | All | All | All |
| Hardware | Cisco | Nexus 9504 | - | All | All | All |
| Hardware | Cisco | Nexus 9508 | - | All | All | All |
| Hardware | Cisco | Nexus 9508 | - | All | All | All |
| Hardware | Cisco | Nexus 9516 | - | All | All | All |
| Hardware | Cisco | Nexus 9516 | - | All | All | All |
| Operating System | Cisco | Nx-os | 12.3(1h) | All | All | All |
| Operating System | Cisco | Nx-os | 12.3\(1h\) | All | All | All |
| Operating System | Cisco | Nx-os | 13.1(2m) | All | All | All |
| Operating System | Cisco | Nx-os | 13.1(2o) | All | All | All |
| Operating System | Cisco | Nx-os | 13.1(2p) | All | All | All |
| Operating System | Cisco | Nx-os | 13.1\(2m\) | All | All | All |
| Operating System | Cisco | Nx-os | 13.1\(2o\) | All | All | All |
| Operating System | Cisco | Nx-os | 13.1\(2p\) | All | All | All |
| Operating System | Cisco | Nx-os | 12.3\(1h\) | All | All | All |
| Operating System | Cisco | Nx-os | 13.1\(2m\) | All | All | All |
| Operating System | Cisco | Nx-os | 13.1\(2o\) | All | All | All |
| Operating System | Cisco | Nx-os | 13.1\(2p\) | All | All | All |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| Cisco Nexus 9000 Series Fabric Switches ACI Mode Border Leaf Endpoint Learning Vulnerability | CISCO | tools.cisco.com | Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.