pf 错误地处理多个 IPv6 片段标头 (CVE-2023-4809)
CVE编号
CVE-2023-4809利用情况
暂无补丁情况
N/A披露时间
2023-09-07漏洞描述
In pf packet processing with a 'scrub fragment reassemble' rule, a packet containing multiple IPv6 fragment headers would be reassembled, and then immediately processed. That is, a packet with multiple fragment extension headers would not be recognized as the correct ultimate payload. Instead a packet with multiple IPv6 fragment headers would unexpectedly be interpreted as a fragmented packet, rather than as whatever the real payload is. As a result, IPv6 fragments may bypass pf firewall rules written on the assumption all fragments have been reassembled and, as a result, be forwarded or processed by the host.解决建议
建议您更新当前系统或软件至最新版，完成漏洞的修复。受影响软件情况
| # | 类型 | 厂商 | 产品 | 版本 | 影响面 | ||||
| 1 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 运行在以下环境 | |||||||||
| 系统 | freebsd | freebsd | * | Up to (excluding) 12.4 | |||||
| 运行在以下环境 | |||||||||
| 系统 | freebsd | freebsd | * | From (including) 13.0 | Up to (excluding) 13.2 | ||||
| 运行在以下环境 | |||||||||
| 系统 | freebsd | freebsd | 12.4 | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | freebsd | freebsd | 13.2 | - | |||||
- 攻击路径 网络
- 攻击复杂度 低
- 权限要求 无
- 影响范围 未更改
- 用户交互 无
- 可用性 无
- 保密性 无
- 完整性 高
| CWE-ID | 漏洞类型 |
| NVD-CWE-Other |
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