Out-of-bounds write in Cisco Adaptive Security Appliance (ASA) and Cisco Firewall Threat Defense (FTD) - CVE-2021-1504

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Main Vulnerability Database Vulnerabilities #VU52716

Out-of-bounds write in Cisco Adaptive Security Appliance (ASA) and Cisco Firewall Threat Defense (FTD) - CVE-2021-1504

Published: April 28, 2021


Vulnerability identifier: #VU52716
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-1504
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Cisco Adaptive Security Appliance (ASA)
Cisco Firewall Threat Defense (FTD)
Software vendor:
Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software VPN interface. A remote non-authenticated attacker can send a specially crafted HTTP request, trigger an out-of-bounds write error and crash the service.

Note: This vulnerability affects only specific AnyConnect and WebVPN configurations. For more information, see the Vulnerable Products section.


Remediation

Install updates from vendor's website.

External links