PT-2020-1989 · Cisco · Cisco Nx-Os+1

Published 2020-02-26 · Updated 2020-03-03 · CVE-2020-3170

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Cisco NX-OS Software (affected versions not specified)

Description A vulnerability in the NX-API feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause an NX-API system process to unexpectedly restart. The vulnerability is due to incorrect validation of the HTTP header of a request that is sent to the NX-API. An attacker could exploit this vulnerability by sending a crafted HTTP request to the NX-API on an affected device. A successful exploit could allow the attacker to cause a denial of service (DoS) condition in the NX-API service; however, the Cisco NX-OS device itself would still be available and passing network traffic. The NX-API feature is disabled by default.

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

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2020-01306

CVE-2020-3170

Affected Products

Cisco Nx-Os

Cisco Nexus

References · 6

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200226-nxos-api-dos · Vendor Advisory
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200226-nxos-api-dos · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-3170 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-3170 · Security Note
• https://bdu.fstec.ru/vul/2020-01306 · Security Note
• https://cxsecurity.com/cveshow/CVE-2020-3170 · Note