Vulnerability Monitor

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CVE-2019-16027

A vulnerability in the implementation of the Intermediate System–to–Intermediate System (IS–IS) routing protocol functionality in Cisco IOS XR Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition in the IS–IS process. The vulnerability is due to improper handling of a Simple Network Management Protocol (SNMP) request for specific Object Identifiers (OIDs) by the IS–IS process. An attacker could exploit this vulnerability by sending a crafted SNMP request to the affected device. A successful exploit could allow the attacker to cause a DoS condition in the IS–IS process.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 32 products from cisco, from cisco, from cisco and 29 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2020, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2020-01-26T05:15:16.677

Last Modified

2024-11-21T04:29:57.407

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.5 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:S/C:N/I:N/A:P

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: SINGLE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: PARTIAL
Exploitability Score

8.0

Impact Score

2.9

Weaknesses
  • Type: Secondary
    CWE-20
  • Type: Primary
    CWE-20
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco ios_xr 4.3.2 Yes
Hardware cisco xr_12404 - No
Hardware cisco xr_12406 - No
Hardware cisco xr_12410 - No
Hardware cisco xr_12416 - No
Operating System cisco ios_xr 5.2.5 Yes
Operating System cisco ios_xr 6.2.2 Yes
Operating System cisco ios_xr 6.2.3 Yes
Operating System cisco ios_xr 6.2.25 Yes
Operating System cisco ios_xr 6.3.3 Yes
Operating System cisco ios_xr 6.4.2 Yes
Hardware cisco ncs_6000 - No
Hardware cisco ncs_6008 - No
Operating System cisco ios_xr 6.1.3 Yes
Operating System cisco ios_xr 6.1.4 Yes
Operating System cisco ios_xr 6.2.3 Yes
Operating System cisco ios_xr 6.2.25 Yes
Operating System cisco ios_xr 6.3.3 Yes
Operating System cisco ios_xr 6.4.2 Yes
Operating System cisco ios_xr 6.5.2 Yes
Operating System cisco ios_xr 6.5.3 Yes
Hardware cisco ncs_5001 - No
Hardware cisco ncs_5002 - No
Hardware cisco ncs_5011 - No
Operating System cisco ios_xr 6.1.3 Yes
Operating System cisco ios_xr 6.1.4 Yes
Operating System cisco ios_xr 6.2.3 Yes
Operating System cisco ios_xr 6.3.3 Yes
Operating System cisco ios_xr 6.3.15 Yes
Operating System cisco ios_xr 6.5.2 Yes
Operating System cisco ios_xr 6.5.3 Yes
Operating System cisco ios_xr 6.6.1 Yes
Operating System cisco ios_xr 6.6.25 Yes
Hardware cisco ncs_5500 - No
Hardware cisco ncs_5501 - No
Hardware cisco ncs_5502 - No
Hardware cisco ncs_5508 - No
Hardware cisco ncs_5516 - No
Operating System cisco ios_xr 6.1.4 Yes
Operating System cisco ios_xr 6.2.3 Yes
Operating System cisco ios_xr 6.4.2 Yes
Hardware cisco crs - No
Operating System cisco ios_xr 6.1.4 Yes
Operating System cisco ios_xr 6.2.3 Yes
Operating System cisco ios_xr 6.4.2 Yes
Operating System cisco ios_xr 6.5.3 Yes
Operating System cisco ios_xr 6.6.2 Yes
Hardware cisco xrv_9000 - No
Operating System cisco ios_xr 6.3.3 Yes
Operating System cisco ios_xr 6.5.3 Yes
Operating System cisco ios_xr 6.6.25 Yes
Hardware cisco ncs_540 - No
Operating System cisco ios_xr 6.6.25 Yes
Hardware cisco ncs_560 - No
Operating System cisco ios_xr 6.1.2 Yes
Operating System cisco ios_xr 6.1.3 Yes
Operating System cisco ios_xr 6.1.4 Yes
Operating System cisco ios_xr 6.2.2 Yes
Operating System cisco ios_xr 6.2.3 Yes
Operating System cisco ios_xr 6.3.2 Yes
Operating System cisco ios_xr 6.3.3 Yes
Operating System cisco ios_xr 6.4.2 Yes
Operating System cisco ios_xr 6.5.2 Yes
Operating System cisco ios_xr 6.5.3 Yes
Operating System cisco ios_xr 6.6.2 Yes
Hardware cisco asr_9000 - No
Hardware cisco asr_9000v v2 No
Hardware cisco asr_9001 - No
Hardware cisco asr_9006 - No
Hardware cisco asr_9010 - No
Hardware cisco asr_9901 - No
Hardware cisco asr_9903 - No
Hardware cisco asr_9904 - No
Hardware cisco asr_9906 - No
Hardware cisco asr_9910 - No
Hardware cisco asr_9912 - No
Hardware cisco asr_9920 - No
Hardware cisco asr_9922 - No
References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.