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CVE-2021-1389— Cisco IOS XR and Cisco NX-OS Software IPv6 Access Control List Bypass Vulnerability

Quick assessment

Affected
Cisco Cisco IOS XR 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 NX-OS Software和Cisco IOS XR都是美国思科（Cisco）公司的产品。Cisco NX-OS Software是一套交换机使用的数据中心级操作系统软件。Cisco IOS XR是一套为其网络设备开发的操作系统。 Cisco NX-OS Software 和 Cisco IOS XR 中对IPV6流量处理过程中存在安全漏洞。该漏洞是由于通过受影响的设备发送的IPv6流量处理不当造成的。攻击者可以通过发送经过受影响设备的特制IPv6数据包来利用此漏洞。成功的利用可能使攻击者能

CVSS 5.8 · Medium EPSS 1.22% · P67

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-1389

Vulnerability Information
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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 XR and Cisco NX-OS Software IPv6 Access Control List Bypass Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the IPv6 traffic processing of Cisco IOS XR Software and Cisco NX-OS Software for certain Cisco devices could allow an unauthenticated, remote attacker to bypass an IPv6 access control list (ACL) that is configured for an interface of an affected device. The vulnerability is due to improper processing of IPv6 traffic that is sent through an affected device. An attacker could exploit this vulnerability by sending crafted IPv6 packets that traverse the affected device. A successful exploit could allow the attacker to access resources that would typically be protected by the interface ACL.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco NX-OS Software和Cisco IOS XR 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco NX-OS Software和Cisco IOS XR都是美国思科（Cisco）公司的产品。Cisco NX-OS Software是一套交换机使用的数据中心级操作系统软件。Cisco IOS XR是一套为其网络设备开发的操作系统。 Cisco NX-OS Software 和 Cisco IOS XR 中对IPV6流量处理过程中存在安全漏洞。该漏洞是由于通过受影响的设备发送的IPv6流量处理不当造成的。攻击者可以通过发送经过受影响设备的特制IPv6数据包来利用此漏洞。成功的利用可能使攻击者能
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 XR Software n/a -

II. Public POCs for CVE-2021-1389

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III. Intelligence Information for CVE-2021-1389

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Vendor Advisories for CVE-2021-1389 (1)

Same Patch Batch · Cisco · 2021-02-04 · 56 CVEs total

CVE-2021-1289 9.8 CRITICAL Cisco Small Business RV160, RV160W, RV260, RV260P, and RV260W VPN Routers Remote Code Exec
CVE-2021-1290 9.8 CRITICAL Cisco Small Business RV160, RV160W, RV260, RV260P, and RV260W VPN Routers Remote Code Exec
CVE-2021-1291 9.8 CRITICAL Cisco Small Business RV160, RV160W, RV260, RV260P, and RV260W VPN Routers Remote Code Exec
CVE-2021-1292 9.8 CRITICAL Cisco Small Business RV160, RV160W, RV260, RV260P, and RV260W VPN Routers Remote Code Exec
CVE-2021-1293 9.8 CRITICAL Cisco Small Business RV160, RV160W, RV260, RV260P, and RV260W VPN Routers Remote Code Exec
CVE-2021-1294 9.8 CRITICAL Cisco Small Business RV160, RV160W, RV260, RV260P, and RV260W VPN Routers Remote Code Exec
CVE-2021-1295 9.8 CRITICAL Cisco Small Business RV160, RV160W, RV260, RV260P, and RV260W VPN Routers Remote Code Exec
CVE-2021-1313 8.6 HIGH Cisco IOS XR Software Enf Broker Denial of Service Vulnerability
CVE-2021-1288 8.6 HIGH Cisco IOS XR Software Enf Broker Denial of Service Vulnerability
CVE-2021-1297 7.5 HIGH Cisco Small Business RV160, RV160W, RV260, RV260P, and RV260W VPN Routers Arbitrary File W
CVE-2021-1296 7.5 HIGH Cisco Small Business RV160, RV160W, RV260, RV260P, and RV260W VPN Routers Arbitrary File W
CVE-2021-1268 7.4 HIGH Cisco IOS XR Software IPv6 Flood Denial of Service Vulnerability
CVE-2021-1322 7.2 HIGH Cisco Small Business RV Series Routers Management Interface Remote Command Execution and D
CVE-2021-1330 7.2 HIGH Cisco Small Business RV Series Routers Management Interface Remote Command Execution and D
CVE-2021-1323 7.2 HIGH Cisco Small Business RV Series Routers Management Interface Remote Command Execution and D
CVE-2021-1324 7.2 HIGH Cisco Small Business RV Series Routers Management Interface Remote Command Execution and D
CVE-2021-1325 7.2 HIGH Cisco Small Business RV Series Routers Management Interface Remote Command Execution and D
CVE-2021-1329 7.2 HIGH Cisco Small Business RV Series Routers Management Interface Remote Command Execution and D
CVE-2021-1327 7.2 HIGH Cisco Small Business RV Series Routers Management Interface Remote Command Execution and D
CVE-2021-1326 7.2 HIGH Cisco Small Business RV Series Routers Management Interface Remote Command Execution and D

Showing top 20 of 56 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cisco IOS XR Software
Same vendor: Cisco
Same weakness: CWE-284

V. Comments for CVE-2021-1389

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