#VU51769 Improper Check for Unusual or Exceptional Conditions in Cisco Systems, Inc products - CVE-2021-1446

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Main Vulnerability Database Vulnerabilities #VU51769

#VU51769 Improper Check for Unusual or Exceptional Conditions in Cisco Systems, Inc products - CVE-2021-1446

Published: March 29, 2021


Vulnerability identifier: #VU51769
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-1446
CWE-ID: CWE-754
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Cisco IOS XE
Cisco ASR 1000 Series Aggregation Services Routers
Cloud Services Router 1000V Series
4000 Series Integrated Services Routers
Cisco 1000 Series Integrated Services Routers
Software vendor:
Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a logic error that occurs when an affected device inspects certain DNS packets. A remote attacker can send specially crafted DNS packets and cause denial of service condition.


Remediation

Install update from vendor's website.

External links