Vulnerability Name:

CVE-2021-34770 (CCN-209838)

Assigned:2021-09-22
Published:2021-09-22
Updated:2021-10-13
Summary:A vulnerability 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 execute arbitrary code with administrative privileges or cause a denial of service (DoS) condition on an affected device. The vulnerability is due to a logic error that occurs during the validation of CAPWAP packets. An attacker could exploit this vulnerability by sending a crafted CAPWAP packet to an affected device. A successful exploit could allow the attacker to execute arbitrary code with administrative privileges or cause the affected device to crash and reload, resulting in a DoS condition.
CVSS v3 Severity:7.2 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)
6.3 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
10.0 Critical (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H)
8.7 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/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): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:9.0 High (CVSS v2 Vector: AV:N/AC:L/Au:S/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
10.0 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-787
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2021-34770

Source: XF
Type: UNKNOWN
ciscoios-cve202134770-code-exec(209838)

Source: CCN
Type: Cisco Security Advisory cisco-sa-ewlc-capwap-rce-LYgj8Kf
Cisco IOS XE Software for Catalyst 9000 Family Wireless Controllers CAPWAP Remote Code Execution Vulnerability

Source: CISCO
Type: Vendor Advisory
20210922 Cisco IOS XE Software for Catalyst 9000 Family Wireless Controllers CAPWAP Remote Code Execution Vulnerability

Vulnerable Configuration:Configuration 1:
  • cpe:/o:cisco:ios_xe:*:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.15.1xbs:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.15.2xbs:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.6.4s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.10.1:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.10.1e:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.10.1s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.11.1:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.11.1a:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.11.1b:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.11.1c:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.11.2:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.1:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.1s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.1t:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.2s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.2t:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.3:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.3s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.4:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:16.12.4a:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:17.1.1:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:17.1.1s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:17.1.1t:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:17.1.2:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:17.1.3:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:17.2.1:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:17.2.1a:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:17.3.1:*:*:*:*:*:*:*
  • 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:/a:cisco:ios_xe:*:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    cisco ios xe *
    cisco ios xe 3.15.1xbs
    cisco ios xe 3.15.2xbs
    cisco ios xe 16.6.4s
    cisco ios xe 16.10.1
    cisco ios xe 16.10.1e
    cisco ios xe 16.10.1s
    cisco ios xe 16.11.1
    cisco ios xe 16.11.1a
    cisco ios xe 16.11.1b
    cisco ios xe 16.11.1c
    cisco ios xe 16.11.2
    cisco ios xe 16.12.1
    cisco ios xe 16.12.1s
    cisco ios xe 16.12.1t
    cisco ios xe 16.12.2s
    cisco ios xe 16.12.2t
    cisco ios xe 16.12.3
    cisco ios xe 16.12.3s
    cisco ios xe 16.12.4
    cisco ios xe 16.12.4a
    cisco ios xe 17.1.1
    cisco ios xe 17.1.1s
    cisco ios xe 17.1.1t
    cisco ios xe 17.1.2
    cisco ios xe 17.1.3
    cisco ios xe 17.2.1
    cisco ios xe 17.2.1a
    cisco ios xe 17.3.1
    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 *