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CVE-2021-1440— Cisco IOS XR Software BGP Resource Public Key Infrastructure 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 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。

CVSS 6.8 · Medium EPSS 0.80% · P55
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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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可达断言
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 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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III. Intelligence Information for CVE-2021-1440

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Vendor Advisories for CVE-2021-1440 (4)

Same Patch Batch · Cisco · 2024-11-18 · 28 CVEs total

CVE-2020-27124 8.6 HIGH Cisco Adaptive Security Appliance Software SSL/TLS Denial of Service Vulnerability
CVE-2020-26071 8.4 HIGH Cisco SD-WAN vEdge Arbitrary File Creation Vulnerability
CVE-2020-26074 7.8 HIGH Cisco SD-WAN vManage Privilege Escalation Vulnerability
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
CVE-2020-26067 5.4 MEDIUM Cisco Webex Teams Web Interface Cross-Site Scripting Vulnerability
CVE-2020-26063 5.4 MEDIUM Cisco Integrated Management Controller Software Authorization Bypass Vulnerability
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 → →

IV. Related Vulnerabilities

Same product: Cisco IOS XR Software
Same vendor: Cisco
Same weakness: CWE-617

V. Comments for CVE-2021-1440

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