PT-2020-4188 · Cisco · Cisco Ios Xe

Published 2020-09-24 · Updated 2023-05-22 · CVE-2020-3480

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: Cisco IOS XE (affected versions not specified)

Description: The issue is related to insufficient validation of unusual or exceptional states in Cisco IOS XE, which could allow a remote attacker to cause a denial of service. The vulnerabilities are due to incomplete handling of Layer 4 packets through the device. An attacker could exploit these vulnerabilities by sending a certain sequence of traffic patterns through the device, resulting in the device reloading or stopping to forward traffic through the firewall.

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

DoS

Improper Check for Exceptional Conditions

Weakness Enumeration

CWE-754

Related Identifiers

BDU:2020-04610

CVE-2020-3480

Affected Products

Cisco Ios Xe

References · 5

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-94ckG4G · Vendor Advisory
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-zbfw-94ckG4G · Vendor Advisory
• https://bdu.fstec.ru/vul/2020-04610 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2020-3480 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/657130 · Security Note