Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
The implementation of SYN cookies (syncookies) in FreeBSD 4.5 through 5.0-RELEASE-p3 uses only 32-bit internal keys when generating syncookies, which makes it easier for remote attackers to conduct brute force ISN guessing attacks and spoof legitimate traffic.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
FreeBSD syncookies TCP初始序列号漏洞
Vulnerability Description
SYN cookies是一种用于通过选择加密的初始化TCP序列号，可以对回应的包做验证来降低SYN'洪水'攻击的影响的技术。FreeBSD默认在TCP堆栈中使用这种技术。 FreeBSD syncookie实现由于生成的密钥长度太短，远程攻击者可以利用这个漏洞通过暴力破解恢复密钥，通过伪造TCP连接来进行攻击。 FreeBSD syncookie的实现使用MAC与一些随时间轮转的密钥来产生ISN，但是，这个密钥长度只有32位，允许攻击者通过暴力攻击恢复，一旦syncookie的密钥被恢复，攻击者可以在密钥
CVSS Information
N/A
Vulnerability Type
N/A