PT-2021-5681 · Cisco · Cisco Ios Xe

Published 2021-09-22 · Updated 2021-10-13 · CVE-2021-34768

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Cisco IOS XE Software for Cisco Catalyst 9000 Family Wireless Controllers (affected versions not specified)

Description The issue is related to insufficient validation of CAPWAP packets in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing. An unauthenticated, remote attacker could exploit this by sending a malformed CAPWAP packet to an affected device, potentially causing the device to crash and reload, resulting in a denial of service (DoS) condition.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Double Free

Weakness Enumeration

CWE-415

Related Identifiers

BDU:2022-00120

CVE-2021-34768

Affected Products

Cisco Ios Xe

References · 8

• https://osv.dev/vulnerability/CVE-2021-34768 · Vendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewlc-capwap-dos-gmNjdKOY · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/669669 · Security Note
• https://bdu.fstec.ru/vul/2022-00120 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-34768 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewlc-capwap-dos-gmNjdKOY · Vendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewlc-capwap-dos-gmNjdKOY?vsfCisco20Security20AdvisoryvscatSecurity20IntelligencevstypeRSSvspCisco20IOS20XE20Software20for20Catalyst20900020Family20Wireless20Controllers20CAPWAP20Denial20of20Service20Vulnerabilitiesvsk1 · Note
• https://t.me/cibsecurity/29256 · Telegram Post