CVE-2020-3449 (CNNVD-202008-142)

MEDIUM
中文标题:
Cisco IOS XR 代码问题漏洞
英文标题:
Cisco IOS XR Software Additional Paths Denial of Service Vulnerability
CVSS分数: 4.3
发布时间: 2020-08-17 18:00:44
漏洞类型: 代码问题
状态: PUBLISHED
数据质量分数: 0.30
数据版本: v3
漏洞描述
中文描述:

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。

英文描述:

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authorized users from properly monitoring the BGP status and prevent BGP from processing new updates, resulting in outdated information in the routing and forwarding tables.

CWE类型:
CWE-754
标签:
(暂无数据)
受影响产品
厂商 产品 版本 版本范围 平台 CPE
Cisco Cisco IOS XR Software n/a - - cpe:2.3:a:cisco:cisco_ios_xr_software:n_a:*:*:*:*:*:*:*
cisco ios_xr * - - cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*
解决方案
中文解决方案:
(暂无数据)
英文解决方案:
(暂无数据)
临时解决方案:
(暂无数据)
参考链接
20200805 Cisco IOS XR Software Additional Paths Denial of Service Vulnerability vendor-advisory
cve.org
访问
CVSS评分详情
3.1 (cna)
MEDIUM
4.3
CVSS向量: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
机密性
NONE
完整性
NONE
可用性
LOW
时间信息
发布时间:
2020-08-17 18:00:44
修改时间:
2024-11-13 18:15:38
创建时间:
2025-11-11 15:36:19
更新时间:
2025-11-11 15:56:24
利用信息
暂无可利用代码信息
数据源详情
数据源 记录ID 版本 提取时间
CVE cve_CVE-2020-3449 2025-11-11 15:20:37 2025-11-11 07:36:19
NVD nvd_CVE-2020-3449 2025-11-11 14:57:02 2025-11-11 07:44:43
CNNVD cnnvd_CNNVD-202008-142 2025-11-11 15:10:28 2025-11-11 07:56:24
版本与语言
当前版本: v3
主要语言: EN
支持语言:
EN ZH
安全公告
暂无安全公告信息
变更历史
v3 CNNVD
2025-11-11 15:56:24
vulnerability_type: 未提取 → 代码问题; cnnvd_id: 未提取 → CNNVD-202008-142; data_sources: ['cve', 'nvd'] → ['cnnvd', 'cve', 'nvd']
查看详细变更
  • vulnerability_type: 未提取 -> 代码问题
  • cnnvd_id: 未提取 -> CNNVD-202008-142
  • data_sources: ['cve', 'nvd'] -> ['cnnvd', 'cve', 'nvd']
v2 NVD
2025-11-11 15:44:43
affected_products_count: 1 → 2; data_sources: ['cve'] → ['cve', 'nvd']
查看详细变更
  • affected_products_count: 1 -> 2
  • data_sources: ['cve'] -> ['cve', 'nvd']