PT-2020-4458 · Cisco · Cisco Ftd+1

Published 2020-10-21 · Updated 2023-08-16 · CVE-2020-3572

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 Adaptive Security Appliance (ASA) Software (affected versions not specified) Cisco Firepower Threat Defense (FTD) Software (affected versions not specified)

Description A vulnerability in the SSL/TLS session handler could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The issue is due to a memory leak when closing SSL/TLS connections in a specific state. An attacker could exploit this by establishing several SSL/TLS sessions and closing them under certain conditions, exhausting memory resources and preventing the device from processing new SSL/TLS connections.

Recommendations For Cisco Adaptive Security Appliance (ASA) Software, manual intervention is required to recover an affected device. For Cisco Firepower Threat Defense (FTD) Software, manual intervention is required to recover an affected device. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Memory Leak

Resource Exhaustion

Weakness Enumeration

CWE-401

CWE-400

Related Identifiers

BDU:2020-05006

CVE-2020-3572

Affected Products

Cisco Asa

Cisco Ftd

References · 6

• https://safe-surf.ru/specialists/bulletins-nkcki/658694 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-tcp-dos-N3DMnU4T · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-3572 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-tcp-dos-N3DMnU4T · Vendor Advisory
• https://bdu.fstec.ru/vul/2020-05006 · Security Note
• https://osv.dev/vulnerability/CVE-2020-3572 · Vendor Advisory