CVE-2020-3408 : A vulnerability in the Split DNS feature of Cisco IOS Software and Cisco IOS XE

Products affected by CVE-2020-3408

Cisco » IOS » Version: 15.8(3)m3
cpe:2.3:o:cisco:ios:15.8\(3\)m3:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » 1100-4g Integrated Services Router » Version: N/A
When used together with: Cisco » 1100-4gltegb Integrated Services Router » Version: N/A
When used together with: Cisco » 1100-4gltena Integrated Services Router » Version: N/A
When used together with: Cisco » 1100-4p Integrated Services Router » Version: N/A
When used together with: Cisco » 1100-6g Integrated Services Router » Version: N/A
When used together with: Cisco » 1100-8p Integrated Services Router » Version: N/A
When used together with: Cisco » 1100-lte Integrated Services Router » Version: N/A
When used together with: Cisco » 1100 Integrated Services Router » Version: N/A
When used together with: Cisco » 1101-4p Integrated Services Router » Version: N/A
When used together with: Cisco » 1101 Integrated Services Router » Version: N/A
When used together with: Cisco » 1109-2p Integrated Services Router » Version: N/A
When used together with: Cisco » 1109-4p Integrated Services Router » Version: N/A
When used together with: Cisco » 1109 Integrated Services Router » Version: N/A
When used together with: Cisco » 1111x-8p Integrated Services Router » Version: N/A
When used together with: Cisco » 1111x Integrated Services Router » Version: N/A
When used together with: Cisco » 111x Integrated Services Router » Version: N/A
When used together with: Cisco » 1120 Integrated Services Router » Version: N/A
When used together with: Cisco » 1160 Integrated Services Router » Version: N/A
When used together with: Cisco » 4221 Integrated Services Router » Version: N/A
When used together with: Cisco » 4331 Integrated Services Router » Version: N/A
When used together with: Cisco » 4431 Integrated Services Router » Version: N/A
When used together with: Cisco » 4451 Integrated Services Router » Version: N/A
When used together with: Cisco » 4461 Integrated Services Router » Version: N/A
When used together with: Cisco » Asr 1000-x » Version: N/A
When used together with: Cisco » Asr 1001 » Version: N/A
When used together with: Cisco » Asr 1001-x » Version: N/A
When used together with: Cisco » Asr 1002 » Version: N/A
When used together with: Cisco » Asr 1002-x » Version: N/A
When used together with: Cisco » Asr 1004 » Version: N/A
When used together with: Cisco » Asr 1006 » Version: N/A
When used together with: Cisco » Asr 1013 » Version: N/A
When used together with: Cisco » Asr1001-hx » Version: N/A
When used together with: Cisco » Asr1001-hx-rf » Version: N/A
When used together with: Cisco » Asr1001-x-rf » Version: N/A
When used together with: Cisco » Asr1001-x-ws » Version: N/A
When used together with: Cisco » Asr1002-hx » Version: N/A
When used together with: Cisco » Asr1002-hx-rf » Version: N/A
When used together with: Cisco » Asr1002-hx-ws » Version: N/A
When used together with: Cisco » Asr1002-x-rf » Version: N/A
When used together with: Cisco » Asr1002-x-ws » Version: N/A
When used together with: Cisco » Catalyst 9800-40 » Version: N/A
When used together with: Cisco » Catalyst 9800-80 » Version: N/A
When used together with: Cisco » Catalyst 9800-cl » Version: N/A
When used together with: Cisco » Catalyst 9800-l » Version: N/A
When used together with: Cisco » Catalyst 9800-l-c » Version: N/A
When used together with: Cisco » Catalyst 9800-l-f » Version: N/A
When used together with: Cisco » Catalyst C9200-24p » Version: N/A
When used together with: Cisco » Catalyst C9200-24t » Version: N/A
When used together with: Cisco » Catalyst C9200-48p » Version: N/A
When used together with: Cisco » Catalyst C9200-48t » Version: N/A
When used together with: Cisco » Catalyst C9200l-24p-4g » Version: N/A
When used together with: Cisco » Catalyst C9200l-24p-4x » Version: N/A
When used together with: Cisco » Catalyst C9200l-24pxg-2y » Version: N/A
When used together with: Cisco » Catalyst C9200l-24pxg-4x » Version: N/A
When used together with: Cisco » Catalyst C9200l-24t-4g » Version: N/A
When used together with: Cisco » Catalyst C9200l-24t-4x » Version: N/A
When used together with: Cisco » Catalyst C9200l-48p-4g » Version: N/A
When used together with: Cisco » Catalyst C9200l-48p-4x » Version: N/A
When used together with: Cisco » Catalyst C9200l-48pxg-2y » Version: N/A
When used together with: Cisco » Catalyst C9200l-48pxg-4x » Version: N/A
When used together with: Cisco » Catalyst C9200l-48t-4g » Version: N/A
When used together with: Cisco » Catalyst C9200l-48t-4x » Version: N/A
When used together with: Cisco » Catalyst C9300-24p » Version: N/A
When used together with: Cisco » Catalyst C9300-24s » Version: N/A
When used together with: Cisco » Catalyst C9300-24t » Version: N/A
When used together with: Cisco » Catalyst C9300-24u » Version: N/A
When used together with: Cisco » Catalyst C9300-24ux » Version: N/A
When used together with: Cisco » Catalyst C9300-48p » Version: N/A
When used together with: Cisco » Catalyst C9300-48s » Version: N/A
When used together with: Cisco » Catalyst C9300-48t » Version: N/A
When used together with: Cisco » Catalyst C9300-48u » Version: N/A
When used together with: Cisco » Catalyst C9300-48un » Version: N/A
When used together with: Cisco » Catalyst C9300-48uxm » Version: N/A
When used together with: Cisco » Catalyst C9300l-24p-4g » Version: N/A
When used together with: Cisco » Catalyst C9300l-24p-4x » Version: N/A
When used together with: Cisco » Catalyst C9300l-24t-4g » Version: N/A
When used together with: Cisco » Catalyst C9300l-24t-4x » Version: N/A
When used together with: Cisco » Catalyst C9300l-48p-4g » Version: N/A
When used together with: Cisco » Catalyst C9300l-48p-4x » Version: N/A
When used together with: Cisco » Catalyst C9300l-48t-4g » Version: N/A
When used together with: Cisco » Catalyst C9300l-48t-4x » Version: N/A
When used together with: Cisco » Catalyst C9404r » Version: N/A
When used together with: Cisco » Catalyst C9407r » Version: N/A
When used together with: Cisco » Catalyst C9410r » Version: N/A
When used together with: Cisco » Catalyst C9500-12q » Version: N/A
When used together with: Cisco » Catalyst C9500-16x » Version: N/A
When used together with: Cisco » Catalyst C9500-24q » Version: N/A
When used together with: Cisco » Catalyst C9500-24y4c » Version: N/A
When used together with: Cisco » Catalyst C9500-32c » Version: N/A
When used together with: Cisco » Catalyst C9500-32qc » Version: N/A
When used together with: Cisco » Catalyst C9500-40x » Version: N/A
When used together with: Cisco » Catalyst C9500-48y4c » Version: N/A
When used together with: Cisco » Csr 1000v
When used together with: Cisco » Ws-c3650-12x48uq » Version: N/A
When used together with: Cisco » Ws-c3650-12x48ur » Version: N/A
When used together with: Cisco » Ws-c3650-12x48uz » Version: N/A
When used together with: Cisco » Ws-c3650-24pd » Version: N/A
When used together with: Cisco » Ws-c3650-24pdm » Version: N/A
When used together with: Cisco » Ws-c3650-24ps » Version: N/A
When used together with: Cisco » Ws-c3650-24td » Version: N/A
When used together with: Cisco » Ws-c3650-24ts » Version: N/A
When used together with: Cisco » Ws-c3650-48fd » Version: N/A
When used together with: Cisco » Ws-c3650-48fq » Version: N/A
When used together with: Cisco » Ws-c3650-48fqm » Version: N/A
When used together with: Cisco » Ws-c3650-48fs » Version: N/A
When used together with: Cisco » Ws-c3650-48pd » Version: N/A
When used together with: Cisco » Ws-c3650-48pq » Version: N/A
When used together with: Cisco » Ws-c3650-48ps » Version: N/A
When used together with: Cisco » Ws-c3650-48td » Version: N/A
When used together with: Cisco » Ws-c3650-48tq » Version: N/A
When used together with: Cisco » Ws-c3650-48ts » Version: N/A
When used together with: Cisco » Ws-c3650-8x24uq » Version: N/A
When used together with: Cisco » Ws-c3850 » Version: N/A
When used together with: Cisco » Ws-c3850-12s » Version: N/A
When used together with: Cisco » Ws-c3850-12x48u » Version: N/A
When used together with: Cisco » Ws-c3850-12xs » Version: N/A
When used together with: Cisco » Ws-c3850-24p » Version: N/A
When used together with: Cisco » Ws-c3850-24s » Version: N/A
When used together with: Cisco » Ws-c3850-24t » Version: N/A
When used together with: Cisco » Ws-c3850-24u » Version: N/A
When used together with: Cisco » Ws-c3850-24xs » Version: N/A
When used together with: Cisco » Ws-c3850-24xu » Version: N/A
When used together with: Cisco » Ws-c3850-48f » Version: N/A
When used together with: Cisco » Ws-c3850-48p » Version: N/A
When used together with: Cisco » Ws-c3850-48t » Version: N/A
When used together with: Cisco » Ws-c3850-48u » Version: N/A
When used together with: Cisco » Ws-c3850-48xs » Version: N/A
Cisco » Ios Xe » Version: 15.8(3)m3
cpe:2.3:o:cisco:ios_xe:15.8\(3\)m3:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » 1100-4g Integrated Services Router » Version: N/A
When used together with: Cisco » 1100-4gltegb Integrated Services Router » Version: N/A
When used together with: Cisco » 1100-4gltena Integrated Services Router » Version: N/A
When used together with: Cisco » 1100-4p Integrated Services Router » Version: N/A
When used together with: Cisco » 1100-6g Integrated Services Router » Version: N/A
When used together with: Cisco » 1100-8p Integrated Services Router » Version: N/A
When used together with: Cisco » 1100-lte Integrated Services Router » Version: N/A
When used together with: Cisco » 1100 Integrated Services Router » Version: N/A
When used together with: Cisco » 1101-4p Integrated Services Router » Version: N/A
When used together with: Cisco » 1101 Integrated Services Router » Version: N/A
When used together with: Cisco » 1109-2p Integrated Services Router » Version: N/A
When used together with: Cisco » 1109-4p Integrated Services Router » Version: N/A
When used together with: Cisco » 1109 Integrated Services Router » Version: N/A
When used together with: Cisco » 1111x-8p Integrated Services Router » Version: N/A
When used together with: Cisco » 1111x Integrated Services Router » Version: N/A
When used together with: Cisco » 111x Integrated Services Router » Version: N/A
When used together with: Cisco » 1120 Integrated Services Router » Version: N/A
When used together with: Cisco » 1160 Integrated Services Router » Version: N/A
When used together with: Cisco » 4221 Integrated Services Router » Version: N/A
When used together with: Cisco » 4331 Integrated Services Router » Version: N/A
When used together with: Cisco » 4431 Integrated Services Router » Version: N/A
When used together with: Cisco » 4451 Integrated Services Router » Version: N/A
When used together with: Cisco » 4461 Integrated Services Router » Version: N/A
When used together with: Cisco » Asr 1000-x » Version: N/A
When used together with: Cisco » Asr 1001 » Version: N/A
When used together with: Cisco » Asr 1001-x » Version: N/A
When used together with: Cisco » Asr 1002 » Version: N/A
When used together with: Cisco » Asr 1002-x » Version: N/A
When used together with: Cisco » Asr 1004 » Version: N/A
When used together with: Cisco » Asr 1006 » Version: N/A
When used together with: Cisco » Asr 1013 » Version: N/A
When used together with: Cisco » Asr1001-hx » Version: N/A
When used together with: Cisco » Asr1001-hx-rf » Version: N/A
When used together with: Cisco » Asr1001-x-rf » Version: N/A
When used together with: Cisco » Asr1001-x-ws » Version: N/A
When used together with: Cisco » Asr1002-hx » Version: N/A
When used together with: Cisco » Asr1002-hx-rf » Version: N/A
When used together with: Cisco » Asr1002-hx-ws » Version: N/A
When used together with: Cisco » Asr1002-x-rf » Version: N/A
When used together with: Cisco » Asr1002-x-ws » Version: N/A
When used together with: Cisco » Catalyst 9800-40 » Version: N/A
When used together with: Cisco » Catalyst 9800-80 » Version: N/A
When used together with: Cisco » Catalyst 9800-cl » Version: N/A
When used together with: Cisco » Catalyst 9800-l » Version: N/A
When used together with: Cisco » Catalyst 9800-l-c » Version: N/A
When used together with: Cisco » Catalyst 9800-l-f » Version: N/A
When used together with: Cisco » Catalyst C9200-24p » Version: N/A
When used together with: Cisco » Catalyst C9200-24t » Version: N/A
When used together with: Cisco » Catalyst C9200-48p » Version: N/A
When used together with: Cisco » Catalyst C9200-48t » Version: N/A
When used together with: Cisco » Catalyst C9200l-24p-4g » Version: N/A
When used together with: Cisco » Catalyst C9200l-24p-4x » Version: N/A
When used together with: Cisco » Catalyst C9200l-24pxg-2y » Version: N/A
When used together with: Cisco » Catalyst C9200l-24pxg-4x » Version: N/A
When used together with: Cisco » Catalyst C9200l-24t-4g » Version: N/A
When used together with: Cisco » Catalyst C9200l-24t-4x » Version: N/A
When used together with: Cisco » Catalyst C9200l-48p-4g » Version: N/A
When used together with: Cisco » Catalyst C9200l-48p-4x » Version: N/A
When used together with: Cisco » Catalyst C9200l-48pxg-2y » Version: N/A
When used together with: Cisco » Catalyst C9200l-48pxg-4x » Version: N/A
When used together with: Cisco » Catalyst C9200l-48t-4g » Version: N/A
When used together with: Cisco » Catalyst C9200l-48t-4x » Version: N/A
When used together with: Cisco » Catalyst C9300-24p » Version: N/A
When used together with: Cisco » Catalyst C9300-24s » Version: N/A
When used together with: Cisco » Catalyst C9300-24t » Version: N/A
When used together with: Cisco » Catalyst C9300-24u » Version: N/A
When used together with: Cisco » Catalyst C9300-24ux » Version: N/A
When used together with: Cisco » Catalyst C9300-48p » Version: N/A
When used together with: Cisco » Catalyst C9300-48s » Version: N/A
When used together with: Cisco » Catalyst C9300-48t » Version: N/A
When used together with: Cisco » Catalyst C9300-48u » Version: N/A
When used together with: Cisco » Catalyst C9300-48un » Version: N/A
When used together with: Cisco » Catalyst C9300-48uxm » Version: N/A
When used together with: Cisco » Catalyst C9300l-24p-4g » Version: N/A
When used together with: Cisco » Catalyst C9300l-24p-4x » Version: N/A
When used together with: Cisco » Catalyst C9300l-24t-4g » Version: N/A
When used together with: Cisco » Catalyst C9300l-24t-4x » Version: N/A
When used together with: Cisco » Catalyst C9300l-48p-4g » Version: N/A
When used together with: Cisco » Catalyst C9300l-48p-4x » Version: N/A
When used together with: Cisco » Catalyst C9300l-48t-4g » Version: N/A
When used together with: Cisco » Catalyst C9300l-48t-4x » Version: N/A
When used together with: Cisco » Catalyst C9404r » Version: N/A
When used together with: Cisco » Catalyst C9407r » Version: N/A
When used together with: Cisco » Catalyst C9410r » Version: N/A
When used together with: Cisco » Catalyst C9500-12q » Version: N/A
When used together with: Cisco » Catalyst C9500-16x » Version: N/A
When used together with: Cisco » Catalyst C9500-24q » Version: N/A
When used together with: Cisco » Catalyst C9500-24y4c » Version: N/A
When used together with: Cisco » Catalyst C9500-32c » Version: N/A
When used together with: Cisco » Catalyst C9500-32qc » Version: N/A
When used together with: Cisco » Catalyst C9500-40x » Version: N/A
When used together with: Cisco » Catalyst C9500-48y4c » Version: N/A
When used together with: Cisco » Csr 1000v
When used together with: Cisco » Ws-c3650-12x48uq » Version: N/A
When used together with: Cisco » Ws-c3650-12x48ur » Version: N/A
When used together with: Cisco » Ws-c3650-12x48uz » Version: N/A
When used together with: Cisco » Ws-c3650-24pd » Version: N/A
When used together with: Cisco » Ws-c3650-24pdm » Version: N/A
When used together with: Cisco » Ws-c3650-24ps » Version: N/A
When used together with: Cisco » Ws-c3650-24td » Version: N/A
When used together with: Cisco » Ws-c3650-24ts » Version: N/A
When used together with: Cisco » Ws-c3650-48fd » Version: N/A
When used together with: Cisco » Ws-c3650-48fq » Version: N/A
When used together with: Cisco » Ws-c3650-48fqm » Version: N/A
When used together with: Cisco » Ws-c3650-48fs » Version: N/A
When used together with: Cisco » Ws-c3650-48pd » Version: N/A
When used together with: Cisco » Ws-c3650-48pq » Version: N/A
When used together with: Cisco » Ws-c3650-48ps » Version: N/A
When used together with: Cisco » Ws-c3650-48td » Version: N/A
When used together with: Cisco » Ws-c3650-48tq » Version: N/A
When used together with: Cisco » Ws-c3650-48ts » Version: N/A
When used together with: Cisco » Ws-c3650-8x24uq » Version: N/A
When used together with: Cisco » Ws-c3850 » Version: N/A
When used together with: Cisco » Ws-c3850-12s » Version: N/A
When used together with: Cisco » Ws-c3850-12x48u » Version: N/A
When used together with: Cisco » Ws-c3850-12xs » Version: N/A
When used together with: Cisco » Ws-c3850-24p » Version: N/A
When used together with: Cisco » Ws-c3850-24s » Version: N/A
When used together with: Cisco » Ws-c3850-24t » Version: N/A
When used together with: Cisco » Ws-c3850-24u » Version: N/A
When used together with: Cisco » Ws-c3850-24xs » Version: N/A
When used together with: Cisco » Ws-c3850-24xu » Version: N/A
When used together with: Cisco » Ws-c3850-48f » Version: N/A
When used together with: Cisco » Ws-c3850-48p » Version: N/A
When used together with: Cisco » Ws-c3850-48t » Version: N/A
When used together with: Cisco » Ws-c3850-48u » Version: N/A
When used together with: Cisco » Ws-c3850-48xs » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2020-3408

EPSS FAQ

1.16%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 77 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-3408

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.8	HIGH	AV:N/AC:L/Au:N/C:N/I:N/A:C	10.0	6.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Complete
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.
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Changed Confidentiality: None Integrity: None Availability: High
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
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Changed Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2020-3408

CWE-185 Incorrect Regular Expression

The product specifies a regular expression in a way that causes data to be improperly matched or compared.

Assigned by: ykramarz@cisco.com (Secondary)
CWE-400 Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-3408

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-splitdns-SPWqpdGW

Cisco IOS and IOS XE Software Split DNS Denial of Service Vulnerability
Vendor Advisory

Vulnerability Details : CVE-2020-3408

Products affected by CVE-2020-3408

Exploit prediction scoring system (EPSS) score for CVE-2020-3408

CVSS scores for CVE-2020-3408

CWE ids for CVE-2020-3408

References for CVE-2020-3408