CVE-2021-34781 (CNNVD-202110-2016)
中文标题:
Cisco Firepower Threat Defense 缓冲区错误漏洞
英文标题:
Cisco Firepower Threat Defense Software SSH Connections Denial of Service Vulnerability
漏洞描述
中文描述:
Cisco Firepower Threat Defense(FTD)是美国思科(Cisco)公司的一套提供下一代防火墙服务的统一软件。 Cisco Firepower Threat Defense Software 存在缓冲区错误漏洞,该漏洞源于在无法建立 SSH 会话时缺乏正确的错误处理。攻击者可以通过向实例发送高频率的精心设计的 SSH 连接来利用此漏洞。成功的利用可能允许攻击者造成资源耗尽,从而导致受影响设备出现 DoS 条件。必须手动重新加载设备才能恢复。
英文描述:
A vulnerability in the processing of SSH connections for multi-instance deployments of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on the affected device. This vulnerability is due to a lack of proper error handling when an SSH session fails to be established. An attacker could exploit this vulnerability by sending a high rate of crafted SSH connections to the instance. A successful exploit could allow the attacker to cause resource exhaustion, which causes a DoS condition on the affected device. The device must be manually reloaded to recover.
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 Adaptive Security Appliance (ASA) Software | n/a | - | - |
cpe:2.3:a:cisco:cisco_adaptive_security_appliance_(asa)_software:n_a:*:*:*:*:*:*:*
|
| cisco | firepower_management_center_virtual_appliance | 6.3.0 | - | - |
cpe:2.3:a:cisco:firepower_management_center_virtual_appliance:6.3.0:*:*:*:*:*:*:*
|
| cisco | firepower_management_center_virtual_appliance | 6.4.0 | - | - |
cpe:2.3:a:cisco:firepower_management_center_virtual_appliance:6.4.0:*:*:*:*:*:*:*
|
| cisco | firepower_management_center_virtual_appliance | 6.4.0.13 | - | - |
cpe:2.3:a:cisco:firepower_management_center_virtual_appliance:6.4.0.13:*:*:*:*:*:*:*
|
| cisco | firepower_management_center_virtual_appliance | 6.5.0 | - | - |
cpe:2.3:a:cisco:firepower_management_center_virtual_appliance:6.5.0:*:*:*:*:*:*:*
|
| cisco | firepower_management_center_virtual_appliance | 6.6.0 | - | - |
cpe:2.3:a:cisco:firepower_management_center_virtual_appliance:6.6.0:*:*:*:*:*:*:*
|
| cisco | firepower_management_center_virtual_appliance | 6.7.0.3 | - | - |
cpe:2.3:a:cisco:firepower_management_center_virtual_appliance:6.7.0.3:*:*:*:*:*:*:*
|
| cisco | firepower_management_center_virtual_appliance | 6.7.1 | - | - |
cpe:2.3:a:cisco:firepower_management_center_virtual_appliance:6.7.1:*:*:*:*:*:*:*
|
| cisco | firepower_management_center_virtual_appliance | 7.0.0 | - | - |
cpe:2.3:a:cisco:firepower_management_center_virtual_appliance:7.0.0:*:*:*:*:*:*:*
|
| cisco | firepower_threat_defense | * | - | - |
cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*
|
| cisco | sourcefire_defense_center | 6.3.0 | - | - |
cpe:2.3:a:cisco:sourcefire_defense_center:6.3.0:*:*:*:*:*:*:*
|
| cisco | sourcefire_defense_center | 6.4.0 | - | - |
cpe:2.3:a:cisco:sourcefire_defense_center:6.4.0:*:*:*:*:*:*:*
|
| cisco | sourcefire_defense_center | 6.4.0.13 | - | - |
cpe:2.3:a:cisco:sourcefire_defense_center:6.4.0.13:*:*:*:*:*:*:*
|
| cisco | sourcefire_defense_center | 6.5.0 | - | - |
cpe:2.3:a:cisco:sourcefire_defense_center:6.5.0:*:*:*:*:*:*:*
|
| cisco | sourcefire_defense_center | 6.6.0 | - | - |
cpe:2.3:a:cisco:sourcefire_defense_center:6.6.0:*:*:*:*:*:*:*
|
| cisco | sourcefire_defense_center | 6.7.0.3 | - | - |
cpe:2.3:a:cisco:sourcefire_defense_center:6.7.0.3:*:*:*:*:*:*:*
|
| cisco | sourcefire_defense_center | 6.7.1 | - | - |
cpe:2.3:a:cisco:sourcefire_defense_center:6.7.1:*:*:*:*:*:*:*
|
| cisco | sourcefire_defense_center | 7.0.0 | - | - |
cpe:2.3:a:cisco:sourcefire_defense_center:7.0.0:*:*:*:*:*:*:*
|
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:N/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-2021-34781 |
2025-11-11 15:21:00 | 2025-11-11 07:36:55 |
| NVD | nvd_CVE-2021-34781 |
2025-11-11 14:57:44 | 2025-11-11 07:45:13 |
| CNNVD | cnnvd_CNNVD-202110-2016 |
2025-11-11 15:10:45 | 2025-11-11 07:56:57 |
版本与语言
安全公告
变更历史
查看详细变更
- vulnerability_type: 未提取 -> 缓冲区错误
- cnnvd_id: 未提取 -> CNNVD-202110-2016
- data_sources: ['cve', 'nvd'] -> ['cnnvd', 'cve', 'nvd']
查看详细变更
- affected_products_count: 1 -> 18
- data_sources: ['cve'] -> ['cve', 'nvd']