Vulnerability Name:

CVE-2021-34769 (CCN-209907)

Assigned:2021-09-21
Published:2021-09-21
Updated:2021-10-13
Summary:Multiple vulnerabilities in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing of Cisco IOS XE Software for Cisco Catalyst 9000 Family Wireless Controllers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. These vulnerabilities are due to insufficient validation of CAPWAP packets. An attacker could exploit the vulnerabilities by sending a malformed CAPWAP packet to an affected device. A successful exploit could allow the attacker to cause the affected device to crash and reload, resulting in a DoS condition.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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): Unchanged
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:7.8 High (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
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-415
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2021-34769

Source: XF
Type: UNKNOWN
cisco-cve202134769-dos(209907)

Source: CCN
Type: Cisco Security Advisory cisco-sa-ewlc-capwap-dos-gmNjdKOY
Cisco IOS XE Software for Catalyst 9000 Family Wireless Controllers CAPWAP Denial of Service Vulnerabilities

Source: CISCO
Type: Vendor Advisory
20210922 Cisco IOS XE Software for Catalyst 9000 Family Wireless Controllers CAPWAP Denial of Service Vulnerabilities

Vulnerable Configuration:Configuration 1:
  • cpe:/o:cisco:ios_xe:3.15.1xbs:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.15.2xbs:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:17.3.1:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:17.3.2:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:17.3.2a:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:17.4.1:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:17.5.1:*:*:*:*:*:*:*
  • AND
  • cpe:/h:cisco:catalyst_9800:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_9800-40:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_9800-40_wireless_controller:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_9800-80:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_9800-80_wireless_controller:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_9800-cl:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_9800-l:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_9800-l-c:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_9800-l-f:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:catalyst_9800_embedded_wireless_controller:-:*:*:*:*:*:*:*

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

    • * Denotes that component is vulnerable
    BACK
    cisco ios xe 3.15.1xbs
    cisco ios xe 3.15.2xbs
    cisco ios xe 17.3.1
    cisco ios xe 17.3.2
    cisco ios xe 17.3.2a
    cisco ios xe 17.4.1
    cisco ios xe 17.5.1
    cisco catalyst 9800 -
    cisco catalyst 9800-40 -
    cisco catalyst 9800-40 wireless controller -
    cisco catalyst 9800-80 -
    cisco catalyst 9800-80 wireless controller -
    cisco catalyst 9800-cl -
    cisco catalyst 9800-l -
    cisco catalyst 9800-l-c -
    cisco catalyst 9800-l-f -
    cisco catalyst 9800 embedded wireless controller -
    cisco ios xe software *