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CVE-2021-1615— Cisco Embedded Wireless Controller Software for Catalyst Access Points Denial of Service Vulnerability

Quick assessment

Affected
Cisco Cisco IOS XE Software
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cisco Embedded Wireless Controller是美国思科（Cisco）公司的一个无线接入器。 Cisco Embedded Wireless Controller 存在安全漏洞，该漏洞源于用于Catalyst接入点的路由器软件数据包处理功能的缓冲区分配不足。漏洞可能允许未经认证的远程攻击者可利用该漏洞在受影响的ap上造成拒绝服务(DoS)攻击。攻击者可以通过向受影响的设备发送精心制作的流量来利用这个漏洞。成功的攻击可能会使攻击者利用该漏洞耗尽可用资源，并对受影响的AP造成DoS攻击，

CVSS 8.6 · High EPSS 1.33% · P70

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-1615

Vulnerability Information
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Vulnerability Title
Cisco Embedded Wireless Controller Software for Catalyst Access Points Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the packet processing functionality of Cisco Embedded Wireless Controller (EWC) Software for Catalyst Access Points (APs) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected AP. This vulnerability is due to insufficient buffer allocation. An attacker could exploit this vulnerability by sending crafted traffic to an affected device. A successful exploit could allow the attacker to exhaust available resources and cause a DoS condition on an affected AP, as well as a DoS condition for client traffic traversing the AP.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不充分的资源池
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Embedded Wireless Controller 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Embedded Wireless Controller是美国思科（Cisco）公司的一个无线接入器。 Cisco Embedded Wireless Controller 存在安全漏洞，该漏洞源于用于Catalyst接入点的路由器软件数据包处理功能的缓冲区分配不足。漏洞可能允许未经认证的远程攻击者可利用该漏洞在受影响的ap上造成拒绝服务(DoS)攻击。攻击者可以通过向受影响的设备发送精心制作的流量来利用这个漏洞。成功的攻击可能会使攻击者利用该漏洞耗尽可用资源，并对受影响的AP造成DoS攻击，
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco IOS XE Software n/a -

II. Public POCs for CVE-2021-1615

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III. Intelligence Information for CVE-2021-1615

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Vendor Advisories for CVE-2021-1615 (1)

Same Patch Batch · Cisco · 2021-09-23 · 33 CVEs total

CVE-2021-34770 10.0 CRITICAL Cisco IOS XE Software for Catalyst 9000 Family Wireless Controllers CAPWAP Remote Code Exe
CVE-2021-1619 9.8 CRITICAL Cisco IOS XE Software NETCONF and RESTCONF Authentication Bypass Vulnerability
CVE-2021-34727 9.8 CRITICAL Cisco IOS XE SD-WAN Software Buffer Overflow Vulnerability
CVE-2021-1624 8.6 HIGH Cisco IOS XE Software Rate Limiting Network Address Translation Denial of Service Vulnerab
CVE-2021-1622 8.6 HIGH Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers Common Open Policy Servi
CVE-2021-1611 8.6 HIGH Cisco IOS XE Software for Catalyst 9800 Series Wireless Controllers EoGRE Denial of Servic
CVE-2021-1565 8.6 HIGH Cisco IOS XE Software for Catalyst 9000 Family Wireless Controllers CAPWAP Denial of Servi
CVE-2021-34769 8.6 HIGH Cisco IOS XE Software for Catalyst 9000 Family Wireless Controllers CAPWAP Denial of Servi
CVE-2021-34768 8.6 HIGH Cisco IOS XE Software for Catalyst 9000 Family Wireless Controllers CAPWAP Denial of Servi
CVE-2021-1419 7.8 HIGH Cisco Access Points SSH Management Privilege Escalation Vulnerability
CVE-2021-1623 7.7 HIGH Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers Simple Network Managemen
CVE-2021-1620 7.7 HIGH Cisco IOS and IOS XE Software IKEv2 AutoReconnect Feature Denial of Service Vulnerability
CVE-2021-34699 7.7 HIGH Cisco IOS and IOS XE Software TrustSec CLI Parser Denial of Service Vulnerability
CVE-2021-1621 7.4 HIGH Cisco IOS XE Software Interface Queue Wedge Denial of Service Vulnerability
CVE-2021-34767 7.4 HIGH Cisco IOS XE Software for Catalyst 9800 Series Wireless Controllers IPv6 Denial of Service
CVE-2021-34740 7.4 HIGH Cisco Aironet Access Points WLAN Control Protocol Packet Buffer Leak Denial of Service Vul
CVE-2021-34714 7.4 HIGH Multiple Cisco Operating Systems Unidirectional Link Detection Denial of Service Vulnerabi
CVE-2021-34703 6.8 MEDIUM Cisco IOS and IOS XE Software Link Layer Discovery Protocol Denial of Service Vulnerabilit
CVE-2021-34729 6.7 MEDIUM Cisco IOS XE SD-WAN Software Command Injection Vulnerability
CVE-2021-34725 6.7 MEDIUM Cisco IOS XE SD-WAN Software Command Injection Vulnerability

Showing top 20 of 33 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cisco IOS XE Software
Same vendor: Cisco
Same weakness: CWE-410

V. Comments for CVE-2021-1615

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