ID

VAR-201908-0847

CVE

CVE-2019-1965

TITLE

Cisco NX-OS Software depletion vulnerability

DESCRIPTION

A vulnerability in the Virtual Shell (VSH) session management for Cisco NX-OS Software could allow an authenticated, remote attacker to cause a VSH process to fail to delete upon termination. This can lead to a build-up of VSH processes that overtime can deplete system memory. When there is no system memory available, this can cause unexpected system behaviors and crashes. The vulnerability is due to the VSH process not being properly deleted when a remote management connection to the device is disconnected. An attacker could exploit this vulnerability by repeatedly performing a remote management connection to the device and terminating the connection in an unexpected manner. A successful exploit could allow the attacker to cause the VSH processes to fail to delete, which can lead to a system-wide denial of service (DoS) condition. The attacker must have valid user credentials to log in to the device using the remote management connection. Cisco NX-OS The software is vulnerable to resource exhaustion.Service operation interruption (DoS) There is a possibility of being put into a state. Cisco Nexus 3000 Series Switches and others are products of Cisco. The Cisco Nexus 3000 Series Switches is a 3000 Series switch. The Cisco Nexus 3500 Platform Switches is a 3500 Series platform switch. The Cisco MDS 9000 Series Multilayer Switches are an MDS 9000 Series multilayer switch. Cisco NX-OS Software is a data center-level operating system software used by a switch

IOT TAXONOMY

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

resource management error

CONFIGURATIONS

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, or otherwise using such software upgrades, accessing, customers agree to follow the terms of the Cisco software license: https://www.cisco.com/c/en/us/products/end-user-license-agreement.html Additionally, refer to the Recommended Releases documents in the release notes for the device., which are available from the Cisco Security Advisories and Alerts page, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Customers Without Service Contracts Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade. Fixed Releases Customers are advised to upgrade to an appropriate release as indicated in the applicable table in this section. To help ensure a complete upgrade solution, customers should consider that this advisory is part of a bundled publication. The following page provides a complete list of bundle advisories: Cisco?Event Response: August 2019 Cisco?FXOS and NX-OS Software Security Advisory Bundled Publication. In the following table(s), administrators can refer to the following Recommended Releases documents.?If a security advisory recommends a later release, or major revision upgrades. When considering software upgrades,Cisco has released free software updates that address the vulnerability described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, the left column lists releases of Cisco?FXOS Software or Cisco?NX-OS Software. The center column indicates whether a release is affected by the vulnerability described in this advisory and the first release that includes the fix for this vulnerability. The right column indicates whether a release is affected by all the vulnerabilities described in this bundle and which release includes fixes for those vulnerabilities. MDS 9000 Series Multilayer Switches: CSCvn50393 Cisco NX-OS Software Release First Fixed Release for This Vulnerability First Fixed Release for All Vulnerabilities Described in the Bundle of Advisories? 5.2 6.2(27) 6.2(29) 6.2 6.2(27) 6.2(29) 7.3 8.4(1) 8.4(1) 8.1 8.4(1) 8.4(1) 8.2 8.4(1) 8.4(1) 8.3 8.4(1) 8.4(1) 8.4 Not vulnerable Not vulnerable Nexus 3000 Series Switches and Nexus 9000 Series Switches in Standalone NX-OS Mode: CSCvi15409 Cisco NX-OS Software Release First Fixed Release for This Vulnerability First Fixed Release for All Vulnerabilities Described in the Bundle of Advisories? Earlier than 7.0(3)I4 7.0(3)I4(9) 7.0(3)I4(9) 7.0(3)I4 7.0(3)I4(9) 7.0(3)I4(9) 7.0(3)I7 7.0(3)I7(4) 7.0(3)I7(6) 9.2 Not vulnerable 9.2(3) 9.3? Not vulnerable Not vulnerable Nexus 3500 Platform Switches: CSCvi15409 Cisco NX-OS Software Release First Fixed Release for This Vulnerability First Fixed Release for All Vulnerabilities Described in the Bundle of Advisories? 6.0(2)A 6.0(2)A8(11) 6.0(2)A8(11) 7.0(3)I7 7.0(3)I7(4) 7.0(3)I7(6) 9.2 Not vulnerable 9.2(3) 9.3 Not vulnerable Not vulnerable Nexus 3600 Platform Switches and Nexus 9500 R-Series Switching Platform: CSCvi15409 Cisco NX-OS Software Release First Fixed Release for This Vulnerability First Fixed Release for All Vulnerabilities Described in the Bundle of Advisories? 7.0(3) 9.2(1) 9.2(3) 9.2 Not vulnerable 9.2(3) 9.4 Not vulnerable Not vulnerable Nexus 5500, Cisco recommends following the advisory guidance. Cisco MDS Series Switches Cisco Nexus 1000V for VMware Switch Cisco Nexus 3000 Series and 3500 Series Switches Cisco Nexus 5000 Series Switches Cisco Nexus 5500 Platform Switches Cisco Nexus 6000 Series Switches Cisco Nexus 7000 Series Switches Cisco Nexus 9000 Series Switches Cisco Nexus 9000 Series ACI-Mode Switches For help determining the best Cisco NX-OS Software release for Cisco UCS, to determine exposure and a complete upgrade solution. In all cases, and 6000 Series Switches: CSCvn50446 Cisco NX-OS Software Release First Fixed Release for This Vulnerability First Fixed Release for All Vulnerabilities Described in the Bundle of Advisories? Earlier than 7.1 7.1(5)N1(1b) 7.1(5)N1(1b) 7.1 7.1(5)N1(1b) 7.1(5)N1(1b) 7.3 7.3(5)N1(1) 7.3(5)N1(1) Nexus 7000 and 7700 Series Switches: CSCvn50443 Cisco NX-OS Software Release First Fixed Release for This Vulnerability First Fixed Release for All Vulnerabilities Described in the Bundle of Advisories? Earlier than 6.2 6.2(22) 6.2(22) 6.2 6.2(22) 6.2(22) 7.2 7.3(4)D1(1) 7.3(4)D1(1) 7.3 7.3(4)D1(1) 7.3(4)D1(1) 8.0 8.2(3) 8.2(3) 8.1 8.2(3) 8.2(3) 8.2 8.2(3)? 8.2(3) 8.3 8.4(1) 8.4(1) 8.4 Not vulnerable? Not vulnerable UCS 6200 and 6300 Series Fabric Interconnects: CSCvn52167 Cisco NX-OS Software Release First Fixed Release for This Vulnerability First Fixed Release for All Vulnerabilities Described in the Bundle of Advisories? Earlier than 3.2 3.2(3k) 3.2(3l) 3.2 3.2(3k) 3.2(3l) 4.0 4.0(2e) 4.0(4e) Additional Resources For help determining the best Cisco NX-OS Software release for a Cisco Nexus Switch, procured from Cisco directly, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers may only download software for which they have a valid license, 5600, additional software feature sets, customers are advised to regularly consult the advisories for Cisco products, downloading

SOURCES

LAST UPDATE DATE

2024-08-14T13:44:47.830000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE