PT-2021-7116 · Cisco · Cisco Asa+1

Saleh Iskandar · Published 2021-11-02 · Updated 2022-05-13 · CVE-2022-20745

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 web services interface for remote access VPN features could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. This issue is due to improper input validation when parsing HTTPS requests. An attacker could exploit this by sending a crafted HTTPS request to an affected device, potentially causing the device to reload and resulting in a DoS condition.

Recommendations For Cisco Adaptive Security Appliance (ASA) Software, consider disabling the web services interface for remote access VPN features until a patch is available. For Cisco Firepower Threat Defense (FTD) Software, restrict access to the web services interface to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2022-03398

CVE-2022-20745

Affected Products

Cisco Asa

Cisco Ftd

References · 8

• https://safe-surf.ru/specialists/bulletins-nkcki/679039 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asafdt-webvpn-dos-tzPSYern · Vendor Advisory
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asafdt-webvpn-dos-tzPSYern · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-20745 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-20745 · Security Note
• https://bdu.fstec.ru/vul/2022-03398 · Security Note
• https://cybersecurity-help.cz/vdb/SB2022042739 · Note
• https://vuldb.com/?id.198868 · Note