PT-2019-2057 · Cisco · Cisco Nexus 9000 Series

Costin Enache · Published 2019-05-01 · Updated 2019-10-09 · CVE-2019-1590

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Cisco Nexus 9000 Series Application Centric Infrastructure (ACI) Mode Switch Software (affected versions not specified)

Description The issue is related to errors in Transport Layer Security (TLS) certificate validation, which could allow a remote attacker to gain full control over all components in the ACI structure of a vulnerable device. The vulnerability is due to insufficient TLS client certificate validations for certificates sent between the various components of an ACI fabric. An attacker with a trusted certificate and corresponding private key could exploit this by presenting a valid certificate while attempting to connect to the targeted device.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Certificate Validation

Weakness Enumeration

CWE-295

Related Identifiers

BDU:2019-01802

CVE-2019-1590

Affected Products

Cisco Nexus 9000 Series

References · 6

• https://bdu.fstec.ru/vul/2019-01802 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2019-1590 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-aci-insecure-fabric · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-1590 · Vendor Advisory
• https://tools.cisco.com/security/center/publicationListing.x?product=Cisco&sort=-day_sir&offset=20#~Vulnerabilities · Note
• https://tools.cisco.com/security/center/publicationListing.x?product=Cisco&sort=-day_sir&offset=20#~Vulnerabilities · Note