CVE-2021-34696— Cisco ASR 900 and ASR 920 Series Aggregation Services Routers Access Control List Bypass Vulnerability
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I. Basic Information for CVE-2021-34696
Vulnerability Information
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Vulnerability Title
Cisco ASR 900 and ASR 920 Series Aggregation Services Routers Access Control List Bypass Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability in the access control list (ACL) programming of Cisco ASR 900 and ASR 920 Series Aggregation Services Routers could allow an unauthenticated, remote attacker to bypass a configured ACL. This vulnerability is due to incorrect programming of hardware when an ACL is configured using a method other than the configuration CLI. An attacker could exploit this vulnerability by attempting to send traffic through an affected device. A successful exploit could allow the attacker to bypass an ACL on the affected device.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
访问控制不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cisco ASR 900 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco ASR 900是美国思科（Cisco）公司的一款900系列聚合服务路由器。 Cisco ASR 900和ASR 920 存在安全漏洞，该漏洞源于使用配置命令行以外的方法配置ACL时，硬件编程错误造成的。攻击者可利用该漏洞向受影响的设备发送流量来绕过ACL。
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-2021-34696
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asr900acl-UeEyCxkvvendor-advisoryx_refsource_CISCO
- https://nvd.nist.gov/vuln/detail/CVE-2021-34696
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-2021-1611 | 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 |
Showing top 20 of 33 CVEs. View all on vendor page → →
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V. Comments for CVE-2021-34696
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