CVE-2021-34714 (CNNVD-202109-1581)
中文标题:
多款Cisco产品输入验证错误漏洞
英文标题:
Multiple Cisco Operating Systems Unidirectional Link Detection Denial of Service Vulnerability
漏洞描述
中文描述:
Cisco NX-OS Software等都是美国思科（Cisco）公司的产品。Cisco NX-OS Software是一套交换机使用的数据中心级操作系统软件。Cisco IOS是一套为其网络设备开发的操作系统。IOS XE是一套为其网络设备开发的操作系统。 Cisco FXOS 软件、Cisco IOS 软件、Cisco IOS XE 软件、Cisco IOS XR 软件和 Cisco NX-OS 软件存在输入验证错误漏洞，该漏洞源于软件的单向链路检测(UDLD)功能对UDLD报文的输入验证不正确。漏洞可能允许未经认证的相邻攻击者利用漏洞导致受影响设备重新加载。攻击者可以通过向受影响的设备发送专门设计的UDLD包来利用这个漏洞。成功的攻击可以让攻击者通过漏洞使受影响的设备重新加载，从而导致拒绝服务(DoS)攻击。
英文描述:
A vulnerability in the Unidirectional Link Detection (UDLD) feature of Cisco FXOS Software, Cisco IOS Software, Cisco IOS XE Software, Cisco IOS XR Software, and Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause an affected device to reload. This vulnerability is due to improper input validation of the UDLD packets. An attacker could exploit this vulnerability by sending specifically crafted UDLD packets to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition. Note: The UDLD feature is disabled by default, and the conditions to exploit this vulnerability are strict. An attacker must have full control of a directly connected device. On Cisco IOS XR devices, the impact is limited to the reload of the UDLD process.
CWE类型:
标签:
受影响产品
| 厂商 | 产品 | 版本 | 版本范围 | 平台 | CPE |
|---|---|---|---|---|---|
| Cisco | Cisco IOS | n/a | - | - |
cpe:2.3:a:cisco:cisco_ios:n_a:*:*:*:*:*:*:*
|
| cisco | fxos | * | - | - |
cpe:2.3:o:cisco:fxos:*:*:*:*:*:*:*:*
|
| cisco | firepower_extensible_operating_system | * | - | - |
cpe:2.3:o:cisco:firepower_extensible_operating_system:*:*:*:*:*:*:*:*
|
| cisco | ios | * | - | - |
cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
|
| cisco | ios_xe | * | - | - |
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
|
| cisco | ios_xr | * | - | - |
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*
|
| cisco | nx-os | * | - | - |
cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*
|
解决方案
中文解决方案:
英文解决方案:
临时解决方案:
参考链接
cve.org
CVSS评分详情
3.1 (cna)
HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
时间信息
利用信息
数据源详情
| 数据源 | 记录ID | 版本 | 提取时间 |
|---|---|---|---|
| CVE | cve_CVE-2021-34714 |
2025-11-11 15:21:00 | 2025-11-11 07:36:55 |
| NVD | nvd_CVE-2021-34714 |
2025-11-11 14:57:43 | 2025-11-11 07:45:13 |
| CNNVD | cnnvd_CNNVD-202109-1581 |
2025-11-11 15:10:43 | 2025-11-11 07:56:54 |
版本与语言
安全公告
变更历史
查看详细变更
- vulnerability_type: 未提取 -> 输入验证错误
- cnnvd_id: 未提取 -> CNNVD-202109-1581
- data_sources: ['cve', 'nvd'] -> ['cnnvd', 'cve', 'nvd']
查看详细变更
- affected_products_count: 1 -> 7
- data_sources: ['cve'] -> ['cve', 'nvd']