SB2021042831 - Multiple vulnerabilities in Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services VPN
Published: April 28, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Out-of-bounds write (CVE-ID: CVE-2021-1445)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 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
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.
2) Out-of-bounds write (CVE-ID: CVE-2021-1504)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 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
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 update from vendor's website.