PT-2021-4719 · Cisco · Cisco Asa+1

Sanmith Prakash · Published 2021-10-27 · Updated 2023-08-16 · CVE-2021-40117

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 message handler could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This issue exists because incoming SSL/TLS packets are not properly processed. An attacker could exploit this vulnerability by sending a crafted SSL/TLS packet 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

Buffer Overflow

Resource Exhaustion

Weakness Enumeration

CWE-119

CWE-400

Related Identifiers

BDU:2021-05425

CVE-2021-40117

Affected Products

Cisco Asa

Cisco Ftd

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2021-40117 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-dos-4ygzLKU9 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-40117 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-05425 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-dos-4ygzLKU9 · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/671528 · Security Note
• https://t.me/cibsecurity/31304 · Telegram Post
• https://cybersecurity-help.cz/vdb/SB2021102806 · Note
• https://t.me/cvenotify/22508 · Telegram Post