CVE-2020-3191

high Cisco
CVSS v3 Base Score
8.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
EPSS Score
1.8%
Exploitation probability in 30 days
Top 23% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Published: May 6, 2020 (2314 days ago)
Last Modified: August 11, 2026
Vendor: Cisco
Source: NVD

Description

A vulnerability in DNS over IPv6 packet processing for Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to unexpectedly reload, resulting in a denial of service (DoS) condition. The vulnerability is due to improper length validation of a field in an IPv6 DNS packet. An attacker could exploit this vulnerability by sending a crafted DNS query over IPv6, which traverses the affected device. An exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. This vulnerability is specific to DNS over IPv6 traffic only.

CWE

CWE-20

Affected Products

cisco secure firewall threat defensecisco asa 5505 firmwarecisco asa 5510 firmwarecisco asa 5512-x firmwarecisco asa 5515-x firmwarecisco asa 5520 firmwarecisco asa 5525-x firmwarecisco asa 5540 firmwarecisco asa 5545-x firmwarecisco asa 5550 firmware

References

🔗 tools.cisco.com 🔗 tools.cisco.com