CVE-2021-1394

Cisco IOS XE Software for Network Convergence System 520 Routers Denial of Service Vulnerability

State: Published
Severity: 5.3 Medium
Published: Mar 24, 2021
Updated: Nov 8, 2024
Reserved: Nov 13, 2020

Description

A vulnerability in the ingress traffic manager of Cisco IOS XE Software for Cisco Network Convergence System (NCS) 520 Routers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition in the web management interface of an affected device. This vulnerability is due to incorrect processing of certain IPv4 TCP traffic that is destined to an affected device. An attacker could exploit this vulnerability by sending a large number of crafted TCP packets to the affected device. A successful exploit could allow the attacker to cause the web management interface to become unavailable, resulting in a DoS condition. Note: This vulnerability does not impact traffic that is going through the device or going to the Management Ethernet interface of the device.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	cisco

Weaknesses

CWE-399

Affected Products

Product	Versions
Cisco IOS XE SoftwareCisco	n/aAffected

References

20210324 Cisco IOS XE Software for Network Convergence System 520 Routers Denial of Service Vulnerabilityvendor-advisory

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