CVE-2020-3449— Cisco IOS XR 代码问题漏洞
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一、 漏洞 CVE-2020-3449 基础信息
漏洞信息
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Vulnerability Title
Cisco IOS XR Software Additional Paths Denial of Service Vulnerability
来源: 美国国家漏洞数据库 NVD
Vulnerability Description
A vulnerability in the Border Gateway Protocol (BGP) additional paths feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to prevent authorized users from monitoring the BGP status and cause the BGP process to stop processing new updates, resulting in a denial of service (DOS) condition. The vulnerability is due to an incorrect calculation of lexicographical order when displaying additional path information within Cisco IOS XR Software, which causes an infinite loop. An attacker could exploit this vulnerability by sending a specific BGP update from a BGP neighbor peer session of an affected device; an authorized user must then issue a show bgp command for the vulnerability to be exploited. A successful exploit could allow the attacker to prevent authorized users from properly monitoring the BGP status and prevent BGP from processing new updates, resulting in outdated information in the routing and forwarding tables.
来源: 美国国家漏洞数据库 NVD
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
来源: 美国国家漏洞数据库 NVD
Vulnerability Type
对因果或异常条件的不恰当检查
来源: 美国国家漏洞数据库 NVD
Vulnerability Title
Cisco IOS XR 代码问题漏洞
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 7.1.3之前版本、7.2.1之前版本和7.3.1之前版本中的BGP Additional Paths功能存在代码问题漏洞。远程攻击者可通过发送BGP更新利用该漏洞造成BGP进程无法处理新的更新，导致拒绝服务。
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-2020-3449 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2020-3449 厂商安全公告 (1)
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-bgp-ErKEqAervendor-advisoryx_refsource_CISCO
同批安全公告 · Cisco · 2020-08-17 · 共 17 条
| CVE-2020-3433 | 7.8 HIGH | Cisco AnyConnect Secure Mobility Client for Windows 代码问题漏洞 |
| CVE-2020-3500 | 6.8 MEDIUM | Cisco StarOS 缓冲区错误漏洞 |
| CVE-2020-3463 | 6.1 MEDIUM | Cisco Webex Meetings 跨站脚本漏洞 |
| CVE-2020-3346 | 6.1 MEDIUM | Cisco Unified Communications Manager和Session Management Edition 跨站脚本漏洞 |
| CVE-2020-3447 | 5.5 MEDIUM | Cisco Content Security Management Appliance和Email Security Appliance 日志信息泄露漏洞 |
| CVE-2020-3435 | 5.5 MEDIUM | Cisco AnyConnect Secure Mobility Client 输入验证错误漏洞 |
| CVE-2020-3434 | 5.5 MEDIUM | Cisco AnyConnect Secure Mobility Client 输入验证错误漏洞 |
| CVE-2020-3472 | 5.0 MEDIUM | Cisco Webex Meetings 信息泄露漏洞 |
| CVE-2020-3464 | 4.8 MEDIUM | Cisco UCS Director 跨站脚本漏洞 |
| CVE-2020-3413 | 4.3 MEDIUM | Cisco Webex Meetings 访问控制错误漏洞 |
| CVE-2020-3412 | 4.3 MEDIUM | Cisco Webex Meetings 访问控制错误漏洞 |
| CVE-2020-3502 | 4.1 MEDIUM | Cisco Webex Meetings Desktop App 输入验证错误漏洞 |
| CVE-2020-3501 | 4.1 MEDIUM | Cisco Webex Meetings Desktop App 输入验证错误漏洞 |
| CVE-2020-3448 | Cisco Cyber Vision Center Software 访问控制错误漏洞 | |
| CVE-2020-3411 | Cisco Digital Network Architecture Center 授权问题漏洞 | |
| CVE-2020-3363 | 多款Cisco产品输入验证错误漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2020-3449
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