PT-2021-5640 · Cisco · Cisco Ios Xe

Fabian Beck + 2 · Published 2021-09-22 · Updated 2021-10-07 · CVE-2021-1565

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. This could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device by sending a malformed CAPWAP packet. A successful exploit could allow the attacker to cause the affected device to crash and reload, resulting in a 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:2022-00078

CVE-2021-1565

Affected Products

Cisco Ios Xe

References · 7

• https://bdu.fstec.ru/vul/2022-00078 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewlc-capwap-dos-gmNjdKOY · Vendor Advisory
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewlc-capwap-dos-gmNjdKOY · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-1565 · Security Note
• https://osv.dev/vulnerability/CVE-2021-1565 · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/669669 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewlc-capwap-dos-gmNjdKOY?vsfCisco20Security20AdvisoryvscatSecurity20IntelligencevstypeRSSvspCisco20IOS20XE20Software20for20Catalyst20900020Family20Wireless20Controllers20CAPWAP20Denial20of20Service20Vulnerabilitiesvsk1 · Note