CVE-2021-1493: cisco adaptive_security_appliance_software Classic Buffer Overflow

Vulnerability summary

CVE-2021-1493 is a high (CVSS 8.5) Classic Buffer Overflow vulnerability in cisco adaptive_security_appliance_software. EPSS estimates a 1.21% chance of exploitation in the next 30 days, higher than 67.8% of scored vulnerabilities.

Timeline

1. 29-04-2021
   PublishedVulnerability first disclosed.
2. 08-11-2024
   Last modifiedVulnerability information updated.

Description

A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker to cause a buffer overflow on an affected system. The vulnerability is due to insufficient boundary checks for specific data that is provided to the web services interface of an affected system. An attacker could exploit this vulnerability by sending a malicious HTTP request. A successful exploit could allow the attacker to cause a buffer overflow condition on the affected system, which could disclose data fragments or cause the device to reload, resulting in a denial of service (DoS) condition.

• CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.