PT-2021-4615 · Cisco · Cisco Asa+1

Published 2021-10-27 · Updated 2023-08-16 · CVE-2021-1573

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 could allow an unauthenticated, remote attacker to trigger 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 malicious HTTPS request to an affected device, potentially causing the device to reload and resulting in a DoS condition.

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

DoS

Stack Overflow

Memory Corruption

Weakness Enumeration

CWE-121

CWE-787

Related Identifiers

BDU:2021-05303

CVE-2021-1573

Affected Products

Cisco Asa

Cisco Ftd

References · 12

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asafdt-webvpn-dos-KSqJAKPA · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/671622 · Security Note
• https://osv.dev/vulnerability/CVE-2021-1573 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-05303 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-1573 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/671582 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asafdt-webvpn-dos-KSqJAKPA · Vendor Advisory
• https://t.me/cvenotify/25657 · Telegram Post
• https://t.me/cibsecurity/35271 · Telegram Post
• https://t.me/cvenotify/25254 · Telegram Post
• https://t.me/cvenotify/56637 · Telegram Post
• https://cybersecurity-help.cz/vdb/SB2021102805 · Note