CVE-2018-0231: cisco adaptive_security_appliance_software Improper Input Validation

Vulnerability summary

CVE-2018-0231 is a high (CVSS 8.6) Improper Input Validation vulnerability in cisco adaptive_security_appliance_software. EPSS estimates a 4.49% chance of exploitation in the next 30 days, higher than 91.3% of scored vulnerabilities.

Timeline

1. 19-04-2018
   PublishedVulnerability first disclosed.
2. 29-11-2024
   Last modifiedVulnerability information updated.

Description

A vulnerability in the Transport Layer Security (TLS) library of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a reload of the affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a malicious TLS message to an interface enabled for Secure Layer Socket (SSL) services on an affected device. Messages using SSL Version 3 (SSLv3) or SSL Version 2 (SSLv2) cannot be be used to exploit this vulnerability. An exploit could allow the attacker to cause a buffer underflow, triggering a crash on an affected device. This vulnerability affects Cisco ASA Software and Cisco FTD Software that is running on the following Cisco products: Adaptive Security Virtual Appliance (ASAv), Firepower Threat Defense Virtual (FTDv), Firepower 2100 Series Security Appliance. Cisco Bug IDs: CSCve18902, CSCve34335, CSCve38446.

• CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.