Vulnerability Name:

CVE-2020-3510 (CCN-188793)

Assigned:2019-12-12
Published:2020-09-24
Updated:2020-10-08
Summary: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.
CVSS v3 Severity:8.6 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H)
7.5 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
8.6 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H)
7.5 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:7.1 High (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-400
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2020-3510

Source: XF
Type: UNKNOWN
cisco-cve20203510-dos(188793)

Source: CCN
Type: Cisco Security Advisory cisco-sa-iosxe-umbrella-dos-t2QMUX37
Cisco IOS XE Software for Catalyst 9200 Series Switches Umbrella Connector Denial of Service Vulnerability

Source: CISCO
Type: Vendor Advisory
20200924 Cisco IOS XE Software for Catalyst 9200 Series Switches Umbrella Connector Denial of Service Vulnerability

Vulnerable Configuration:Configuration 1:
  • cpe:/o:cisco:ios_xe:16.12.1:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.2:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:17.1.1:*:*:*:*:*:*:*
  • AND
  • cpe:/h:cisco:catalyst_c9200-24p:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9200-24t:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9200-48p:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9200-48t:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9200l-24p-4g:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9200l-24p-4x:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9200l-24pxg-2y:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9200l-24pxg-4x:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9200l-24t-4g:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9200l-24t-4x:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9200l-48p-4g:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9200l-48p-4x:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9300-24t:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9300-24u:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9300-24ux:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9300-48p:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9300-48s:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9300-48t:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9300-48u:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9300-48un:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9300-48uxm:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9300l-24p-4g:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9300l-24p-4x:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9300l-24t-4g:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9300l-24t-4x:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9300l-48p-4g:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9300l-48p-4x:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9300l-48t-4g:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9300l-48t-4x:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9200l-48pxg-2y:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9200l-48pxg-4x:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9200l-48t-4g:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9200l-48t-4x:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9300-24p:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9300-24s:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9404r:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9500-12q:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9500-16x:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9500-24q:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9500-24y4c:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9500-32c:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9500-32qc:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9500-40x:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9500-48y4c:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9407r:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9410r:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9600-lc-24c:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9600-lc-48yl:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9600-lc-48tx:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_c9600-lc-48s:-:*:*:*:*:*:*:*

  • Configuration CCN 1:
  • cpe:/o:cisco:ios_xe_software:*:*:*:*:*:*:*:*

  • * Denotes that component is vulnerable
    BACK
    cisco ios xe 16.12.1
    cisco ios xe 16.12.2
    cisco ios xe 17.1.1
    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 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 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 c9404r -
    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 catalyst c9407r -
    cisco catalyst c9410r -
    cisco catalyst c9600-lc-24c -
    cisco catalyst c9600-lc-48yl -
    cisco catalyst c9600-lc-48tx -
    cisco catalyst c9600-lc-48s -
    cisco ios xe software *