PT-2019-3140 · Cisco · Cisco Nx-Os+1

Published 2019-08-28 · Updated 2020-10-16 · CVE-2019-1968

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

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

Description The issue is due to insufficient validation of input data in the NX-API feature of Cisco NX-OS Software. This could allow a remote attacker to cause the NX-API system process to restart unexpectedly by sending a crafted HTTP request. A successful exploit could result in a denial of service (DoS) condition in the NX-API service, although the NX-OS device itself would remain available and continue passing network traffic.

Recommendations For Cisco NX-OS Software, update to a version that includes the fix for this issue. As a temporary workaround, consider disabling the NX-API feature until a patch is available. Restrict access to the NX-API to minimize the risk of exploitation.

Fix

DoS

RCE

Improper Encoding or Escaping of Output

Weakness Enumeration

CWE-20

CWE-116

Related Identifiers

BDU:2019-03126

CVE-2019-1968

Affected Products

Cisco Nx-Os

Cisco Nexus

References · 4

• https://bdu.fstec.ru/vul/2019-03126 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2019-1968 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nxos-api-dos · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-1968 · Vendor Advisory