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

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2024-20406— Cisco IOS XR Software Intermediate System-to-Intermediate System 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存在安全漏洞，该漏洞源于对入口 IS-IS 数据包的输入验证不足。

CVSS 7.4 · High EPSS 0.24% · P13

Possible ATT&CK Techniques 1 AI

T1498 · Network Denial of Service
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2024-20406

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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 XR Software Intermediate System-to-Intermediate System Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the segment routing feature for the Intermediate System-to-Intermediate System (IS-IS) protocol of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient input validation of ingress IS-IS packets. An attacker could exploit this vulnerability by sending specific IS-IS packets to an affected device after forming an adjacency. A successful exploit could allow the attacker to cause the IS-IS process on all affected devices that are participating in the Flexible Algorithm to crash and restart, resulting in a DoS condition. Note: The IS-IS protocol is a routing protocol. To exploit this vulnerability, an attacker must be Layer 2-adjacent to the affected device and must have formed an adjacency. This vulnerability affects segment routing for IS-IS over IPv4 and IPv6 control planes as well as devices that are configured as level 1, level 2, or multi-level routing IS-IS type.
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
输入验证不恰当
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存在安全漏洞，该漏洞源于对入口 IS-IS 数据包的输入验证不足。
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 7.4.1 -

II. Public POCs for CVE-2024-20406

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2024-20406

请登录查看更多情报信息。

Vendor Advisories for CVE-2024-20406 (1)

Same Patch Batch · Cisco · 2024-09-11 · 9 CVEs total

CVE-2024-20381 8.8 HIGH Cisco Network Services Orchestrator Configuration Update Authorization Bypass Vulnerabilit
CVE-2024-20398 8.8 HIGH Cisco IOS XR Software Local Privilege Escalation Vulnerability
CVE-2024-20304 8.6 HIGH Cisco IOS XR Software Packet Memory Exhaustion Vulnerability
CVE-2024-20489 8.4 HIGH Cisco Routed Passive Optical Network Cleartext Password Vulnerability
CVE-2024-20317 7.4 HIGH Cisco IOS XR Software Layer 2 Services Denial of Service Vulnerability
CVE-2024-20483 7.2 HIGH Cisco IOS XR PON Controller Command Injection Vulnerabilities
CVE-2024-20343 5.5 MEDIUM Cisco IOS XR Software CLI Arbitrary File Read Vulnerability
CVE-2024-20390 5.3 MEDIUM Cisco IOS XR Software Dedicated XML Agent TCP Denial of Service Vulnerability

IV. Related Vulnerabilities

Same product: Cisco IOS XR Software
Same vendor: Cisco
Same weakness: CWE-20

V. Comments for CVE-2024-20406

No comments yet

Leave a comment