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CVE-2020-3284— Cisco IOS XR Software Enhanced Preboot eXecution Environment Unsigned Code Execution 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 64-bit Preboot eXecution Environment 存在访问控制错误漏洞，该漏洞使攻击者可以通过Cisco IOS XR 64位的Preboot eXecution Environment绕过限制，以提升其特权

AI Predicted 9.8 Difficulty: Moderate EPSS 2.89% · P86
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I. Basic Information for CVE-2020-3284

Vulnerability Information
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Vulnerability Title
Cisco IOS XR Software Enhanced Preboot eXecution Environment Unsigned Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the enhanced Preboot eXecution Environment (PXE) boot loader for Cisco IOS XR 64-bit Software could allow an unauthenticated, remote attacker to execute unsigned code during the PXE boot process on an affected device. The PXE boot loader is part of the BIOS and runs over the management interface of hardware platforms that are running Cisco IOS XR Software only. The vulnerability exists because internal commands that are issued when the PXE network boot process is loading a software image are not properly verified. An attacker could exploit this vulnerability by compromising the PXE boot server and replacing a valid software image with a malicious one. Alternatively, the attacker could impersonate the PXE boot server and send a PXE boot reply with a malicious file. A successful exploit could allow the attacker to execute unsigned code on the affected device. Note: To fix this vulnerability, both the Cisco IOS XR Software and the BIOS must be upgraded. The BIOS code is included in Cisco IOS XR Software but might require additional installation steps. For further information, see the Fixed Software section of this advisory.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco IOS XR 访问控制错误漏洞
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 64-bit Preboot eXecution Environment 存在访问控制错误漏洞，该漏洞使攻击者可以通过Cisco IOS XR 64位的Preboot eXecution Environment绕过限制，以提升其特权
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-2020-3284

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III. Intelligence Information for CVE-2020-3284

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Vendor Advisories for CVE-2020-3284 (1)

Same Patch Batch · Cisco · 2020-11-06 · 27 CVEs total

CVE-2020-3603 7.8 HIGH Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code Execution Vulne
CVE-2020-3573 7.8 HIGH Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code Execution Vulne
CVE-2020-3593 7.8 HIGH Cisco SD-WAN Software Privilege Escalation Vulnerability
CVE-2020-3594 7.8 HIGH Cisco SD-WAN Software Privilege Escalation Vulnerability
CVE-2020-3600 7.8 HIGH Cisco SD-WAN Software Privilege Escalation Vulnerability
CVE-2020-3604 7.8 HIGH Cisco Webex Network Recording Player and Cisco Webex Player Arbitrary Code Execution Vulne
CVE-2020-3595 7.8 HIGH Cisco SD-WAN Software Privilege Escalation Vulnerability
CVE-2020-3574 7.5 HIGH Cisco IP Phone TCP Packet Flood Denial of Service Vulnerability
CVE-2020-3588 7.3 HIGH Cisco Webex Meetings Desktop App Arbitrary Code Execution Vulnerability
CVE-2020-3556 7.3 HIGH Cisco AnyConnect Secure Mobility Client Arbitrary Code Execution Vulnerability
CVE-2020-27129 6.7 MEDIUM Cisco SD-WAN vManage Software Command Injection Vulnerability
CVE-2020-3592 6.5 MEDIUM Cisco SD-WAN vManage Software Authorization Bypass Vulnerability
CVE-2020-26084 6.5 MEDIUM Cisco Edge Fog Fabric Resource Exposure Vulnerability
CVE-2020-27128 6.5 MEDIUM Cisco SD-WAN vManage Software Arbitrary File Creation Vulnerability
CVE-2020-3590 6.4 MEDIUM Cisco SD-WAN vManage Software Cross-Site Scripting Vulnerability
CVE-2020-3587 6.4 MEDIUM Cisco SD-WAN vManage Software Cross-Site Scripting Vulnerability
CVE-2020-3371 6.3 MEDIUM Cisco Integrated Management Controller Command Injection Vulnerability
CVE-2020-3551 6.1 MEDIUM Cisco Identity Services Engine Cross-Site Scripting Vulnerability
CVE-2020-27123 5.5 MEDIUM Cisco AnyConnect Secure Mobility Client for Windows Arbitrary File Read Vulnerability
CVE-2020-26083 4.8 MEDIUM Cisco Identity Services Engine Cross-Site Scripting Vulnerability

Showing top 20 of 27 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-2020-3284

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