CVE-2023-20006: high-severity vulnerability in Cisco Adaptive Security Appliance (ASA) Software
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.6epss 0.9%
In short
A flaw in Cisco ASA and FTD firewall devices allows attackers to send specially crafted SSL/TLS traffic that crashes the device's cryptography hardware, causing it to restart and stop working temporarily.
Technical detail
An implementation error in hardware-based SSL/TLS cryptographic offloading in Cisco ASA and FTD for Firepower 2100 Series allows unauthenticated remote attackers to trigger unexpected behavior in the cryptography engine via malformed SSL/TLS streams, resulting in device reload and denial of service.
Summary generated and translated by AI from the official description.
A vulnerability in the hardware-based SSL/TLS cryptography functionality of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software for Cisco Firepower 2100 Series Appliances could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition.
This vulnerability is due to an implementation error within the cryptographic functions for SSL/TLS traffic processing when they are offloaded to the hardware. An attacker could exploit this vulnerability by sending a crafted stream of SSL/TLS traffic to an affected device. A successful exploit could allow the attacker to cause an unexpected error in the hardware-based cryptography engine, which could cause the device to reload.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Affected products
Cisco · Cisco Adaptive Security Appliance (ASA) SoftwareCisco · Cisco Firepower Threat Defense SoftwareRelated CVEs — Cisco Adaptive Security Appliance (ASA) Software
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