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 Series Integrated Services Router | ||
| Cisco 1101-4p Integrated Services Router | ||
| Cisco 1101 Integrated Services Router | ||
| Cisco 1109-2p | ||
| 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-X Integrated Services Router | ||
| Cisco 4441 Integrated Services Router | ||
| Cisco ASR 1000 series software | ||
| Cisco ASR 1001 | ||
| Cisco ASR 1001-X | ||
| Cisco ASR 1002 Fixed Router | ||
| Cisco ASR 1002-X | ||
| Cisco ASR 1004 | ||
| Cisco ASR 1006 | ||
| Cisco ASR 1013 | ||
| Cisco ASR 1001-HX | ||
| Cisco ASR 1001-HX-RF | ||
| Cisco ASR 1001-X | ||
| Cisco ASR 1001-X | ||
| Cisco ASR 1002-HX | ||
| Cisco ASR 1002-HX | ||
| Cisco ASR 1002-HX | ||
| Cisco ASR 1002-X | ||
| Cisco ASR 1002-X | ||
| Cisco Catalyst 9800-40 | ||
| Cisco Catalyst 9800-80 | ||
| Cisco Catalyst 9800-L | ||
| Cisco Catalyst 9800-L firmware | ||
| Cisco Catalyst 9800-L | ||
| Cisco Catalyst 9800-L | ||
| 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 9300-24T-A | ||
| Cisco Catalyst C9300-24U | ||
| Cisco Catalyst C9300-24UX | ||
| Cisco Catalyst C9300-48P | ||
| Cisco Catalyst C9300-48S | ||
| Cisco Catalyst C9300-48T | ||
| Cisco Catalyst 9300-48U | ||
| Cisco Catalyst C9300 Series | ||
| Cisco Catalyst C9300-48UXM | ||
| Cisco Catalyst C9300L-24P-4G | ||
| Cisco Catalyst C9300L-24P-4X | ||
| Cisco Catalyst 9300L-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 9500 | ||
| Cisco Catalyst 9500 Series | ||
| Cisco Catalyst C9500-24Q | ||
| Cisco Catalyst C9500-24Y4C | ||
| Cisco Catalyst C9500-32C | ||
| Cisco Catalyst C9500-32QC | ||
| Cisco Catalyst 9500-40X-E | ||
| Cisco Catalyst C9500-48Y4C | ||
| Cisco Cloud Services Router 1000V | ||
| Cisco Catalyst 3650 Series Switches | ||
| Cisco Catalyst 3650-12X48UR | ||
| Cisco Catalyst 3650 Series Switch | ||
| Cisco Catalyst 3650 Series Switch | ||
| Cisco Catalyst 3650 24 Port PoE Switch (WS-C3650-24PD) | ||
| Cisco Catalyst 3650-24PS | ||
| Cisco Catalyst 3650-24TD Switch | ||
| Cisco Catalyst 3650-24TS | ||
| Cisco Catalyst 3650 Series Switch | ||
| Cisco Catalyst 3650-48FQ Switch | ||
| Cisco Catalyst 3650-48FQM Switch | ||
| Cisco Catalyst 3650 Series Switch WS-C3650-48FS | ||
| Cisco Catalyst 3650-48PD | ||
| Cisco Catalyst 3650 Series Switches | ||
| Cisco WS-C3650-48PS | ||
| Cisco Catalyst 3650 Series Switches | ||
| Cisco Catalyst 3650 48TQ | ||
| Cisco Catalyst 3650-48TS Switch | ||
| Cisco ws-c3650-8x24uq | ||
| Cisco Catalyst 3850 | ||
| Cisco Catalyst 3850 Series Switches | ||
| Cisco Catalyst 3850 Series Switch | ||
| Cisco Catalyst 3850 Switch (model WS-C3850-12XS) | ||
| Cisco Catalyst 3850 Series Switch | ||
| Cisco Catalyst 3850 Series Switches | ||
| Cisco Catalyst 3850 | ||
| Cisco Catalyst 3850 Series Switch | ||
| Cisco Catalyst 3850 Switch | ||
| Cisco Catalyst 3850-24XU | ||
| Cisco Catalyst 3850 48F Switch | ||
| Cisco Catalyst 3850 48 Port PoE Switch | ||
| Cisco Catalyst 3850 Series Switches | ||
| Cisco ws-c3850-48u | ||
| Cisco Catalyst 3850 Series Switches |
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Reference Links
- agent/weakness
- agent/type
- agent/references
- agent/severity
- agent/title
- agent/author
- agent/description
- agent/event
- agent/first-publish-date
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/source
- agent/softwarecombine
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- 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 series integrated services router
- canonical/cisco 1101-4p integrated services router
- canonical/cisco 1101 integrated services router
- canonical/cisco 1109-2p
- 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-x integrated services router
- canonical/cisco 4441 integrated services router
- canonical/cisco asr 1000 series software
- canonical/cisco asr 1001
- canonical/cisco asr 1001-x
- canonical/cisco asr 1002 fixed router
- canonical/cisco asr 1002-x
- canonical/cisco asr 1004
- canonical/cisco asr 1006
- canonical/cisco asr 1013
- canonical/cisco asr 1001-hx
- canonical/cisco asr 1001-hx-rf
- canonical/cisco asr 1002-hx
- canonical/cisco catalyst 9800-40
- canonical/cisco catalyst 9800-80
- canonical/cisco catalyst 9800-l
- canonical/cisco catalyst 9800-l firmware
- 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 9300-24t-a
- 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 9300-48u
- canonical/cisco catalyst c9300 series
- canonical/cisco catalyst c9300-48uxm
- canonical/cisco catalyst c9300l-24p-4g
- canonical/cisco catalyst c9300l-24p-4x
- canonical/cisco catalyst 9300l-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 9500
- canonical/cisco catalyst 9500 series
- canonical/cisco catalyst c9500-24q
- canonical/cisco catalyst c9500-24y4c
- canonical/cisco catalyst c9500-32c
- canonical/cisco catalyst c9500-32qc
- canonical/cisco catalyst 9500-40x-e
- canonical/cisco catalyst c9500-48y4c
- canonical/cisco cloud services router 1000v
- canonical/cisco catalyst 3650 series switches
- canonical/cisco catalyst 3650-12x48ur
- canonical/cisco catalyst 3650 series switch
- canonical/cisco catalyst 3650 24 port poe switch (ws-c3650-24pd)
- canonical/cisco catalyst 3650-24ps
- canonical/cisco catalyst 3650-24td switch
- canonical/cisco catalyst 3650-24ts
- canonical/cisco catalyst 3650-48fq switch
- canonical/cisco catalyst 3650-48fqm switch
- canonical/cisco catalyst 3650 series switch ws-c3650-48fs
- canonical/cisco catalyst 3650-48pd
- canonical/cisco ws-c3650-48ps
- canonical/cisco catalyst 3650 48tq
- canonical/cisco catalyst 3650-48ts switch
- canonical/cisco ws-c3650-8x24uq
- canonical/cisco catalyst 3850
- canonical/cisco catalyst 3850 series switches
- canonical/cisco catalyst 3850 series switch
- canonical/cisco catalyst 3850 switch (model ws-c3850-12xs)
- canonical/cisco catalyst 3850 switch
- canonical/cisco catalyst 3850-24xu
- canonical/cisco catalyst 3850 48f switch
- canonical/cisco catalyst 3850 48 port poe switch
- canonical/cisco ws-c3850-48u