SB2021042831 - Multiple vulnerabilities in Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services VPN

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Main Vulnerability Database SB2021042831

SB2021042831 - Multiple vulnerabilities in Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services VPN

Published: April 28, 2021

Security Bulletin ID SB2021042831
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Out-of-bounds write (CVE-ID: CVE-2021-1445)

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)

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.

References