CVE-2020-3408: Cisco IOS and IOS XE Software Split DNS Denial of Service Vulnerability
First published: Thu Sep 24 2020(Updated: )
A vulnerability in the Split DNS feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability occurs because the regular expression (regex) engine that is used with the Split DNS feature of affected releases may time out when it processes the DNS name list configuration. An attacker could exploit this vulnerability by trying to resolve an address or hostname that the affected device handles. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS | =15.8\(3\)m3 | |
| Cisco IOS XE | =15.8\(3\)m3 | |
| Cisco 1100-4g Integrated Services Router | ||
| Cisco 1100-4gltegb Integrated Services Router | ||
| Cisco 1100-4gltena Integrated Services Router | ||
| Cisco 1100-4p Integrated Services Router | ||
| Cisco 1100-6g Integrated Services Router | ||
| Cisco 1100-8p Integrated Services Router | ||
| Cisco 1100-lte Integrated Services Router | ||
| Cisco 1100 Integrated Services Router | ||
| Cisco 1101-4p Integrated Services Router | ||
| Cisco 1101 Integrated Services Router | ||
| Cisco 1109-2p Integrated Services Router | ||
| Cisco 1109-4p Integrated Services Router | ||
| Cisco 1109 Integrated Services Router | ||
| Cisco 1111x-8p Integrated Services Router | ||
| Cisco 1111x Integrated Services Router | ||
| Cisco 111x Integrated Services Router | ||
| Cisco 1120 Integrated Services Router | ||
| Cisco 1160 Integrated Services Router | ||
| Cisco 4221 Integrated Services Router | ||
| Cisco 4331 Integrated Services Router | ||
| Cisco 4431 Integrated Services Router | ||
| Cisco 4451 Integrated Services Router | ||
| Cisco 4461 Integrated Services Router | ||
| Cisco Asr 1000-x | ||
| Cisco Asr 1001 | ||
| Cisco Asr 1001-x | ||
| Cisco Asr 1002 | ||
| Cisco Asr 1002-x | ||
| Cisco Asr 1004 | ||
| Cisco Asr 1006 | ||
| Cisco Asr 1013 | ||
| Cisco Asr1001-hx | ||
| Cisco Asr1001-hx-rf | ||
| Cisco Asr1001-x-rf | ||
| Cisco Asr1001-x-ws | ||
| Cisco Asr1002-hx | ||
| Cisco Asr1002-hx-rf | ||
| Cisco Asr1002-hx-ws | ||
| Cisco Asr1002-x-rf | ||
| Cisco Asr1002-x-ws | ||
| Cisco Catalyst 9800-40 | ||
| Cisco Catalyst 9800-80 | ||
| Cisco Catalyst 9800-cl | ||
| Cisco Catalyst 9800-l | ||
| Cisco Catalyst 9800-l-c | ||
| Cisco Catalyst 9800-l-f | ||
| Cisco Catalyst C9200-24p | ||
| Cisco Catalyst C9200-24t | ||
| Cisco Catalyst C9200-48p | ||
| Cisco Catalyst C9200-48t | ||
| Cisco Catalyst C9200l-24p-4g | ||
| Cisco Catalyst C9200l-24p-4x | ||
| Cisco Catalyst C9200l-24pxg-2y | ||
| Cisco Catalyst C9200l-24pxg-4x | ||
| Cisco Catalyst C9200l-24t-4g | ||
| Cisco Catalyst C9200l-24t-4x | ||
| Cisco Catalyst C9200l-48p-4g | ||
| Cisco Catalyst C9200l-48p-4x | ||
| Cisco Catalyst C9200l-48pxg-2y | ||
| Cisco Catalyst C9200l-48pxg-4x | ||
| Cisco Catalyst C9200l-48t-4g | ||
| Cisco Catalyst C9200l-48t-4x | ||
| Cisco Catalyst C9300-24p | ||
| Cisco Catalyst C9300-24s | ||
| Cisco Catalyst C9300-24t | ||
| Cisco Catalyst C9300-24u | ||
| Cisco Catalyst C9300-24ux | ||
| Cisco Catalyst C9300-48p | ||
| Cisco Catalyst C9300-48s | ||
| Cisco Catalyst C9300-48t | ||
| Cisco Catalyst C9300-48u | ||
| Cisco Catalyst C9300-48un | ||
| Cisco Catalyst C9300-48uxm | ||
| Cisco Catalyst C9300l-24p-4g | ||
| Cisco Catalyst C9300l-24p-4x | ||
| Cisco Catalyst C9300l-24t-4g | ||
| Cisco Catalyst C9300l-24t-4x | ||
| Cisco Catalyst C9300l-48p-4g | ||
| Cisco Catalyst C9300l-48p-4x | ||
| Cisco Catalyst C9300l-48t-4g | ||
| Cisco Catalyst C9300l-48t-4x | ||
| Cisco Catalyst C9404r | ||
| Cisco Catalyst C9407r | ||
| Cisco Catalyst C9410r | ||
| Cisco Catalyst C9500-12q | ||
| Cisco Catalyst C9500-16x | ||
| Cisco Catalyst C9500-24q | ||
| Cisco Catalyst C9500-24y4c | ||
| Cisco Catalyst C9500-32c | ||
| Cisco Catalyst C9500-32qc | ||
| Cisco Catalyst C9500-40x | ||
| Cisco Catalyst C9500-48y4c | ||
| Cisco Csr 1000v | ||
| Cisco Ws-c3650-12x48uq | ||
| Cisco Ws-c3650-12x48ur | ||
| Cisco Ws-c3650-12x48uz | ||
| Cisco Ws-c3650-24pd | ||
| Cisco Ws-c3650-24pdm | ||
| Cisco Ws-c3650-24ps | ||
| Cisco Ws-c3650-24td | ||
| Cisco Ws-c3650-24ts | ||
| Cisco Ws-c3650-48fd | ||
| Cisco Ws-c3650-48fq | ||
| Cisco Ws-c3650-48fqm | ||
| Cisco Ws-c3650-48fs | ||
| Cisco Ws-c3650-48pd | ||
| Cisco Ws-c3650-48pq | ||
| Cisco Ws-c3650-48ps | ||
| Cisco Ws-c3650-48td | ||
| Cisco Ws-c3650-48tq | ||
| Cisco Ws-c3650-48ts | ||
| Cisco Ws-c3650-8x24uq | ||
| Cisco Ws-c3850 | ||
| Cisco Ws-c3850-12s | ||
| Cisco Ws-c3850-12x48u | ||
| Cisco Ws-c3850-12xs | ||
| Cisco Ws-c3850-24p | ||
| Cisco Ws-c3850-24s | ||
| Cisco Ws-c3850-24t | ||
| Cisco Ws-c3850-24u | ||
| Cisco Ws-c3850-24xs | ||
| Cisco Ws-c3850-24xu | ||
| Cisco Ws-c3850-48f | ||
| Cisco Ws-c3850-48p | ||
| Cisco Ws-c3850-48t | ||
| Cisco Ws-c3850-48u | ||
| Cisco Ws-c3850-48xs |
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Reference Links
- collector/nvd-index
- agent/weakness
- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/references
- agent/severity
- agent/title
- agent/last-modified-date
- agent/author
- agent/tags
- agent/description
- agent/first-publish-date
- agent/event
- vendor/cisco
- canonical/cisco ios
- version/cisco ios/15.8\(3\)m3
- canonical/cisco ios xe
- version/cisco ios xe/15.8\(3\)m3
- canonical/cisco 1100-4g integrated services router
- canonical/cisco 1100-4gltegb integrated services router
- canonical/cisco 1100-4gltena integrated services router
- canonical/cisco 1100-4p integrated services router
- canonical/cisco 1100-6g integrated services router
- canonical/cisco 1100-8p integrated services router
- canonical/cisco 1100-lte integrated services router
- canonical/cisco 1100 integrated services router
- canonical/cisco 1101-4p integrated services router
- canonical/cisco 1101 integrated services router
- canonical/cisco 1109-2p integrated services router
- canonical/cisco 1109-4p integrated services router
- canonical/cisco 1109 integrated services router
- canonical/cisco 1111x-8p integrated services router
- canonical/cisco 1111x integrated services router
- canonical/cisco 111x integrated services router
- canonical/cisco 1120 integrated services router
- canonical/cisco 1160 integrated services router
- canonical/cisco 4221 integrated services router
- canonical/cisco 4331 integrated services router
- canonical/cisco 4431 integrated services router
- canonical/cisco 4451 integrated services router
- canonical/cisco 4461 integrated services router
- canonical/cisco asr 1000-x
- canonical/cisco asr 1001
- canonical/cisco asr 1001-x
- canonical/cisco asr 1002
- canonical/cisco asr 1002-x
- canonical/cisco asr 1004
- canonical/cisco asr 1006
- canonical/cisco asr 1013
- canonical/cisco asr1001-hx
- canonical/cisco asr1001-hx-rf
- canonical/cisco asr1001-x-rf
- canonical/cisco asr1001-x-ws
- canonical/cisco asr1002-hx
- canonical/cisco asr1002-hx-rf
- canonical/cisco asr1002-hx-ws
- canonical/cisco asr1002-x-rf
- canonical/cisco asr1002-x-ws
- canonical/cisco catalyst 9800-40
- canonical/cisco catalyst 9800-80
- canonical/cisco catalyst 9800-cl
- canonical/cisco catalyst 9800-l
- canonical/cisco catalyst 9800-l-c
- canonical/cisco catalyst 9800-l-f
- canonical/cisco catalyst c9200-24p
- canonical/cisco catalyst c9200-24t
- canonical/cisco catalyst c9200-48p
- canonical/cisco catalyst c9200-48t
- canonical/cisco catalyst c9200l-24p-4g
- canonical/cisco catalyst c9200l-24p-4x
- canonical/cisco catalyst c9200l-24pxg-2y
- canonical/cisco catalyst c9200l-24pxg-4x
- canonical/cisco catalyst c9200l-24t-4g
- canonical/cisco catalyst c9200l-24t-4x
- canonical/cisco catalyst c9200l-48p-4g
- canonical/cisco catalyst c9200l-48p-4x
- canonical/cisco catalyst c9200l-48pxg-2y
- canonical/cisco catalyst c9200l-48pxg-4x
- canonical/cisco catalyst c9200l-48t-4g
- canonical/cisco catalyst c9200l-48t-4x
- canonical/cisco catalyst c9300-24p
- canonical/cisco catalyst c9300-24s
- canonical/cisco catalyst c9300-24t
- canonical/cisco catalyst c9300-24u
- canonical/cisco catalyst c9300-24ux
- canonical/cisco catalyst c9300-48p
- canonical/cisco catalyst c9300-48s
- canonical/cisco catalyst c9300-48t
- canonical/cisco catalyst c9300-48u
- canonical/cisco catalyst c9300-48un
- canonical/cisco catalyst c9300-48uxm
- canonical/cisco catalyst c9300l-24p-4g
- canonical/cisco catalyst c9300l-24p-4x
- canonical/cisco catalyst c9300l-24t-4g
- canonical/cisco catalyst c9300l-24t-4x
- canonical/cisco catalyst c9300l-48p-4g
- canonical/cisco catalyst c9300l-48p-4x
- canonical/cisco catalyst c9300l-48t-4g
- canonical/cisco catalyst c9300l-48t-4x
- canonical/cisco catalyst c9404r
- canonical/cisco catalyst c9407r
- canonical/cisco catalyst c9410r
- canonical/cisco catalyst c9500-12q
- canonical/cisco catalyst c9500-16x
- canonical/cisco catalyst c9500-24q
- canonical/cisco catalyst c9500-24y4c
- canonical/cisco catalyst c9500-32c
- canonical/cisco catalyst c9500-32qc
- canonical/cisco catalyst c9500-40x
- canonical/cisco catalyst c9500-48y4c
- canonical/cisco csr 1000v
- canonical/cisco ws-c3650-12x48uq
- canonical/cisco ws-c3650-12x48ur
- canonical/cisco ws-c3650-12x48uz
- canonical/cisco ws-c3650-24pd
- canonical/cisco ws-c3650-24pdm
- canonical/cisco ws-c3650-24ps
- canonical/cisco ws-c3650-24td
- canonical/cisco ws-c3650-24ts
- canonical/cisco ws-c3650-48fd
- canonical/cisco ws-c3650-48fq
- canonical/cisco ws-c3650-48fqm
- canonical/cisco ws-c3650-48fs
- canonical/cisco ws-c3650-48pd
- canonical/cisco ws-c3650-48pq
- canonical/cisco ws-c3650-48ps
- canonical/cisco ws-c3650-48td
- canonical/cisco ws-c3650-48tq
- canonical/cisco ws-c3650-48ts
- canonical/cisco ws-c3650-8x24uq
- canonical/cisco ws-c3850
- canonical/cisco ws-c3850-12s
- canonical/cisco ws-c3850-12x48u
- canonical/cisco ws-c3850-12xs
- canonical/cisco ws-c3850-24p
- canonical/cisco ws-c3850-24s
- canonical/cisco ws-c3850-24t
- canonical/cisco ws-c3850-24u
- canonical/cisco ws-c3850-24xs
- canonical/cisco ws-c3850-24xu
- canonical/cisco ws-c3850-48f
- canonical/cisco ws-c3850-48p
- canonical/cisco ws-c3850-48t
- canonical/cisco ws-c3850-48u
- canonical/cisco ws-c3850-48xs