7.7
CVSSv3

CVE-2021-1422

Published: 16/07/2021 Updated: 07/11/2023
CVSS v2 Base Score: 6.8 | Impact Score: 6.9 | Exploitability Score: 8
CVSS v3 Base Score: 7.7 | Impact Score: 4 | Exploitability Score: 3.1
VMScore: 605
Vector: AV:N/AC:L/Au:S/C:N/I:N/A:C

Vulnerability Summary

A vulnerability in the software cryptography module of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker or an unauthenticated attacker in a man-in-the-middle position to cause an unexpected reload of the device that results in a denial of service (DoS) condition. The vulnerability is due to a logic error in how the software cryptography module handles specific types of decryption errors. An attacker could exploit this vulnerability by sending malicious packets over an established IPsec connection. A successful exploit could cause the device to crash, forcing it to reload. Important: Successful exploitation of this vulnerability would not cause a compromise of any encrypted data. Note: This vulnerability affects only Cisco ASA Software Release 9.16.1 and Cisco FTD Software Release 7.0.0.

Vulnerability Trend

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cisco adaptive_security_appliance_software 9.16.1

cisco firepower_threat_defense 7.0.0.0

Vendor Advisories

A vulnerability in the software cryptography module of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker or an unauthenticated attacker in a man-in-the-middle position to cause an unexpected reload of the device that results in a denial of service (DoS) c ...