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CVE-2021-1268— Cisco IOS XR Software IPv6 Flood Denial of Service 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 IOS XR是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS XR 中IPv6协议处理存在安全漏洞，该漏洞源于软件错误地转发了具有管理接口上的IPv6节点本地多播组地址目标的IPv6数据包。攻击者可以通过与管理接口连接到同一网络并注入具有IPv6节点本地多播组地址目标的IPv6数据包来利用此漏洞。成功的利用可能使攻击者在相应的网络上引起IPv6泛洪。利用取决于该网段上的Cisco IOS XR软件节点的数量，利用可能会导致过多的网络流量，从而导致网络性能下降或

CVSS 7.4 · High EPSS 0.50% · P41
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I. Basic Information for CVE-2021-1268

Vulnerability Information
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Vulnerability Title
Cisco IOS XR Software IPv6 Flood Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the IPv6 protocol handling of the management interfaces of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause an IPv6 flood on the management interface network of an affected device. The vulnerability exists because the software incorrectly forwards IPv6 packets that have an IPv6 node-local multicast group address destination and are received on the management interfaces. An attacker could exploit this vulnerability by connecting to the same network as the management interfaces and injecting IPv6 packets that have an IPv6 node-local multicast group address destination. A successful exploit could allow the attacker to cause an IPv6 flood on the corresponding network. Depending on the number of Cisco IOS XR Software nodes on that network segment, exploitation could cause excessive network traffic, resulting in network degradation or a denial of service (DoS) condition.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对预期协议的遵守不足
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco IOS XR 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco IOS XR是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS XR 中IPv6协议处理存在安全漏洞，该漏洞源于软件错误地转发了具有管理接口上的IPv6节点本地多播组地址目标的IPv6数据包。攻击者可以通过与管理接口连接到同一网络并注入具有IPv6节点本地多播组地址目标的IPv6数据包来利用此漏洞。成功的利用可能使攻击者在相应的网络上引起IPv6泛洪。利用取决于该网段上的Cisco IOS XR软件节点的数量，利用可能会导致过多的网络流量，从而导致网络性能下降或
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-2021-1268

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III. Intelligence Information for CVE-2021-1268

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Vendor Advisories for CVE-2021-1268 (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-2021-1323 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-2021-1324 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-2021-1326 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-2021-1331 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-2021-1328 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

V. Comments for CVE-2021-1268

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