CVE-2021-1440— Cisco IOS XR Software BGP Resource Public Key Infrastructure Denial of Service Vulnerability
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I. Basic Information for CVE-2021-1440
Vulnerability Information
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Vulnerability Title
Cisco IOS XR Software BGP Resource Public Key Infrastructure Denial of Service Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability in the implementation of the Resource Public Key Infrastructure (RPKI) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause the Border Gateway Protocol (BGP) process to crash, resulting in a denial of service (DoS) condition. This vulnerability is due to the incorrect handling of a specific RPKI to Router (RTR) Protocol packet header. An attacker could exploit this vulnerability by compromising the RPKI validator server and sending a specifically crafted RTR packet to an affected device. Alternatively, the attacker could use man-in-the-middle techniques to impersonate the RPKI validator server and send a specifically crafted RTR response packet over the established RTR TCP connection to the affected device. A successful exploit could allow the attacker to cause a DoS condition because the BGP process could constantly restart and BGP routing could become unstable.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.This advisory is part of the September 2021 release of the Cisco IOS XR Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see .
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
可达断言
Source: NVD (National Vulnerability Database)
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 Software 存在安全漏洞，该漏洞可能允许未经身份验证的远程攻击者导致边界网关协议进程崩溃，从而导致拒绝服务攻击。
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 | 6.6.1 | - |
II. Public POCs for CVE-2021-1440
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|---|
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Same Patch Batch · Cisco · 2024-11-18 · 28 CVEs total
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| CVE-2020-26073 | 7.5 HIGH | Cisco SD-WAN vManage Directory Traversal Vulnerability |
| CVE-2021-1232 | 6.5 MEDIUM | Cisco SD-WAN vManage Information Disclosure Vulnerability |
| CVE-2021-1379 | 6.5 MEDIUM | Cisco IP Phones Cisco Discovery Protocol and Link Layer Discovery Protocol Remote Code Exe |
| CVE-2020-3539 | 6.3 MEDIUM | Cisco Data Center Network Manager Authorization Bypass Vulnerability |
| CVE-2021-1444 | 6.1 MEDIUM | Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) |
| CVE-2020-3431 | 6.1 MEDIUM | Cisco Small Business RV Series Routers Cross-Site Scripting Vulnerability |
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| CVE-2020-3548 | 5.3 MEDIUM | Cisco Email Security Appliance Denial Of Service Vulnerability |
| CVE-2021-1234 | 5.3 MEDIUM | Cisco SD-WAN vManage Information Disclosure Vulnerabilities |
| CVE-2021-1132 | 5.3 MEDIUM | Cisco Network Services Orchestrator Path Traversal Vulnerability |
| CVE-2020-26062 | 5.3 MEDIUM | Cisco Integrated Management Controller Username Enumeration Vulnerability |
| CVE-2021-1424 | 5.3 MEDIUM | Cisco ASR 5000 Series Software (StarOS) ipsecmgr Process Denial of Service Vulnerability |
| CVE-2021-1461 | 4.9 MEDIUM | Cisco SD-WAN Software Signature Verification Bypass Vulnerability |
| CVE-2020-3538 | 4.6 MEDIUM | Cisco Data Center Network Manager Path Traversal Vulnerability |
| CVE-2021-1465 | 4.3 MEDIUM | Cisco?SD-WAN vManage Software 输入验证错误漏洞 |
| CVE-2021-1410 | 4.3 MEDIUM | Cisco Webex Meetings Unauthorized Distribution List Update Vulnerability |
Showing top 20 of 28 CVEs. View all on vendor page → →
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V. Comments for CVE-2021-1440
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