Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2021-1611— Cisco IOS XE Software for Catalyst 9800 Series Wireless Controllers EoGRE 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 IOS和Cisco Catalyst都是美国思科（Cisco）公司的产品。Cisco IOS是一套为其网络设备开发的操作系统。Cisco Catalyst是一系列交换机。 多款Cisco产品存在资源管理错误漏洞，该漏洞源于对畸形的EoGRE报文处理不当造成的。攻击者可利用该漏洞在受影响的设备上造成拒绝服务(DoS)条件。

CVSS 8.6 · High EPSS 1.33% · P70

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2021-1611

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Cisco IOS XE Software for Catalyst 9800 Series Wireless Controllers EoGRE Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in Ethernet over GRE (EoGRE) packet processing of Cisco IOS XE Wireless Controller Software for the Cisco Catalyst 9800 Family Wireless Controller, Embedded Wireless Controller, and Embedded Wireless on Catalyst 9000 Series Switches could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper processing of malformed EoGRE packets. An attacker could exploit this vulnerability by sending malicious packets to the affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.
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
资源管理错误
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco IOS和Cisco Catalyst 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco IOS和Cisco Catalyst都是美国思科（Cisco）公司的产品。Cisco IOS是一套为其网络设备开发的操作系统。Cisco Catalyst是一系列交换机。 多款Cisco产品存在资源管理错误漏洞，该漏洞源于对畸形的EoGRE报文处理不当造成的。攻击者可利用该漏洞在受影响的设备上造成拒绝服务(DoS)条件。
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-2021-1611

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2021-1611

请登录查看更多情报信息。

Vendor Advisories for CVE-2021-1611 (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-2021-1615 8.6 HIGH Cisco Embedded Wireless Controller Software for Catalyst Access Points Denial of Service V
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-399

V. Comments for CVE-2021-1611

No comments yet

Leave a comment