Vulnerability Details : CVE-2020-3191
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.
Vulnerability category: Input validationDenial of service
Exploit prediction scoring system (EPSS) score for CVE-2020-3191
Probability of exploitation activity in the next 30 days: 0.16%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 52 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2020-3191
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST |
|
8.6
|
HIGH | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
3.9
|
4.0
|
Cisco Systems, Inc. |
|
8.6
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
3.9
|
4.0
|
NIST |
CWE ids for CVE-2020-3191
-
The 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.Assigned by:
- nvd@nist.gov (Primary)
- ykramarz@cisco.com (Secondary)
References for CVE-2020-3191
-
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ipv6-67pA658k
Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software IPv6 DNS Denial of Service VulnerabilityVendor Advisory
Products affected by CVE-2020-3191
- Cisco » Adaptive Security Appliance SoftwareVersions from including (>=) 9.6 and before (<) 9.6.4.36cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
- Cisco » Adaptive Security Appliance SoftwareVersions from including (>=) 9.8 and before (<) 9.8.4.12cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
- Cisco » Adaptive Security Appliance SoftwareVersions from including (>=) 9.12 and before (<) 9.12.2.9cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
- Cisco » Adaptive Security Appliance SoftwareVersions from including (>=) 9.10 and before (<) 9.10.1.37cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
- Cisco » Adaptive Security Appliance SoftwareVersions from including (>=) 9.9 and before (<) 9.9.2.66cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5505_firmware:96.4\(0.42\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5505_firmware:9.4\(1\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5510_firmware:9.4\(1\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5510_firmware:96.4\(0.42\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5512-x_firmware:9.4\(1\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5512-x_firmware:96.4\(0.42\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5515-x_firmware:9.4\(1\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5515-x_firmware:96.4\(0.42\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5520_firmware:9.4\(1\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5520_firmware:96.4\(0.42\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5525-x_firmware:9.4\(1\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5525-x_firmware:96.4\(0.42\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5540_firmware:9.4\(1\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5540_firmware:96.4\(0.42\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5545-x_firmware:9.4\(1\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5545-x_firmware:96.4\(0.42\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5550_firmware:9.4\(1\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5550_firmware:96.4\(0.42\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5555-x_firmware:9.4\(1\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5555-x_firmware:96.4\(0.42\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5580_firmware:9.4\(1\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5580_firmware:96.4\(0.42\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5585-x_firmware:9.4\(1\):*:*:*:*:*:*:*
- cpe:2.3:o:cisco:asa_5585-x_firmware:96.4\(0.42\):*:*:*:*:*:*:*