CVE-2020-3510

CVSS V2 High 7.1 CVSS V3 High 8.6
Description
A vulnerability in the Umbrella Connector component of Cisco IOS XE Software for Cisco Catalyst 9200 Series Switches could allow an unauthenticated, remote attacker to trigger a reload, resulting in a denial of service condition on an affected device. The vulnerability is due to insufficient error handling when parsing DNS requests. An attacker could exploit this vulnerability by sending a series of malicious DNS requests to an Umbrella Connector client interface of an affected device. A successful exploit could allow the attacker to cause a crash of the iosd process, which triggers a reload of the affected device.
Overview
  • CVE ID
  • CVE-2020-3510
  • Assigner
  • ykramarz@cisco.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2020-09-24T18:15:21
  • Last Modified Date
  • 2020-10-08T14:07:41
Weakness Enumerations
CWE URL
CWE-400 http://cwe.mitre.org/data/definitions/400.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:o:cisco:ios_xe:16.12.1:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:16.12.2:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:ios_xe:17.1.1:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:cisco:catalyst_c9200-24p:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9200-24t:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9200-48p:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9200-48t:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9200l-24p-4g:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9200l-24p-4x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9200l-24pxg-2y:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9200l-24pxg-4x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9200l-24t-4g:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9200l-24t-4x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9200l-48p-4g:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9200l-48p-4x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9200l-48pxg-2y:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9200l-48pxg-4x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9200l-48t-4g:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9200l-48t-4x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9300-24p:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9300-24s:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9300-24t:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9300-24u:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9300-24ux:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9300-48p:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9300-48s:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9300-48t:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9300-48u:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9300-48un:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9300-48uxm:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9300l-24p-4g:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9300l-24p-4x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9300l-24t-4g:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9300l-24t-4x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9300l-48p-4g:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9300l-48p-4x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9300l-48t-4g:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9300l-48t-4x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9404r:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9407r:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9410r:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9500-12q:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9500-16x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9500-24q:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9500-24y4c:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9500-32c:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9500-32qc:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9500-40x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9500-48y4c:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9600-lc-24c:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9600-lc-48s:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9600-lc-48tx:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:catalyst_c9600-lc-48yl:-:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:N/C:N/I:N/A:C
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • COMPLETE
  • Base Score
  • 7.1
  • Severity
  • HIGH
  • Exploitability Score
  • 8.6
  • Impact Score
  • 6.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • CHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 8.6
  • Base Severity
  • HIGH
  • Exploitability Score
  • 3.9
  • Impact Score
  • 4
References
Reference URL Reference Tags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-umbrella-dos-t2QMUX37 Vendor Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2020-3510
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-3510
History
Created Old Value New Value Data Type Notes
2022-05-10 17:09:47 Added to TrackCVE
2022-12-04 23:19:15 psirt@cisco.com ykramarz@cisco.com CVE Assigner updated
2022-12-04 23:19:15 2020-09-24T18:15Z 2020-09-24T18:15:21 CVE Published Date updated
2022-12-04 23:19:15 2020-10-08T14:07:41 CVE Modified Date updated
2022-12-04 23:19:15 Analyzed Vulnerability Status updated