CVE-2020-3284— Cisco IOS XR 访问控制错误漏洞
一分钟漏洞结论
影响对象
Cisco Cisco IOS XR Software
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
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
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一、 漏洞 CVE-2020-3284 基础信息
漏洞信息
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Vulnerability Title
Cisco IOS XR Software Enhanced Preboot eXecution Environment Unsigned Code Execution Vulnerability
来源: 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.
来源: CVE Program / CVE List V5
CVSS Information
N/A
来源: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
来源: CVE Program / CVE List V5
Vulnerability Title
Cisco IOS XR 访问控制错误漏洞
来源: 中国国家信息安全漏洞库 CNNVD
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
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| Cisco | Cisco IOS XR Software | n/a | - |
|
二、漏洞 CVE-2020-3284 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
高级
未找到公开 POC。
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CVE-2020-3284 厂商安全公告 (1)
-
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-pxe-unsign-code-exec-qAa78fD2 vendor-advisory x_refsource_CISCO
同批安全公告 · Cisco · 2020-11-06 · 共 27 条
| CVE-2020-3603 | 7.8 HIGH | Cisco Webex Network Recording Player 缓冲区错误漏洞 |
| CVE-2020-3573 | 7.8 HIGH | Cisco Webex Network Recording Player 缓冲区错误漏洞 |
| CVE-2020-3593 | 7.8 HIGH | Cisco SD-WAN vManage Software 安全漏洞 |
| CVE-2020-3594 | 7.8 HIGH | Cisco SD-WAN vEdge 安全漏洞 |
| CVE-2020-3600 | 7.8 HIGH | Cisco SD-WAN vEdge 安全漏洞 |
| CVE-2020-3604 | 7.8 HIGH | Cisco Webex Network Recording Player 缓冲区错误漏洞 |
| CVE-2020-3595 | 7.8 HIGH | Cisco SD-WAN vEdge 访问控制错误漏洞 |
| CVE-2020-3574 | 7.5 HIGH | Cisco IP Phone 8800 Series和Cisco IP Phone 7800 Series 安全漏洞 |
| CVE-2020-3588 | 7.3 HIGH | Cisco Webex Meetings Desktop App 路径遍历漏洞 |
| CVE-2020-3556 | 7.3 HIGH | Cisco AnyConnect Secure Mobility Client 输入验证错误漏洞 |
| CVE-2020-27129 | 6.7 MEDIUM | Cisco SD-WAN vManage Software 参数注入漏洞 |
| CVE-2020-3592 | 6.5 MEDIUM | Cisco SD-WAN vManage Software 访问控制错误漏洞 |
| CVE-2020-26084 | 6.5 MEDIUM | Cisco?Edge Fog Fabric 授权问题漏洞 |
| CVE-2020-27128 | 6.5 MEDIUM | Cisco SD-WAN vManage Software 路径遍历漏洞 |
| CVE-2020-3590 | 6.4 MEDIUM | Cisco SD-WAN vManage Software 跨站脚本漏洞 |
| CVE-2020-3587 | 6.4 MEDIUM | Cisco SD-WAN vManage Software 跨站脚本漏洞 |
| CVE-2020-3371 | 6.3 MEDIUM | Cisco Integrated Management Controller 操作系统命令注入漏洞 |
| CVE-2020-3551 | 6.1 MEDIUM | Cisco Identity Services Engine 跨站脚本漏洞 |
| CVE-2020-27123 | 5.5 MEDIUM | Cisco AnyConnect Secure Mobility Client for Windows 安全漏洞 |
| CVE-2020-26083 | 4.8 MEDIUM | Cisco Identity Services Engine 跨站脚本漏洞 |
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IV. Related Vulnerabilities
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