Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
The flush_signal_handlers function in kernel/signal.c in the Linux kernel before 3.8.4 preserves the value of the sa_restorer field across an exec operation, which makes it easier for local users to bypass the ASLR protection mechanism via a crafted application containing a sigaction system call.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
Linux Kernel ‘sa_restorer’字段本地信息泄露漏洞
Vulnerability Description
Linux kernel是美国Linux基金会发布的开源操作系统Linux所使用的内核。NFSv4 implementation是其中的一个分布式文件系统协议。 Linux kernel 3.8.4之前版本中的kernel/signal.c中的‘flush_signal_handlers’函数中存在漏洞，该漏洞源于程序没有阻止sa_restorer字段的值跨exec操作。通过包含sigaction系统调用的特制应用程序，本地攻击者利用该漏洞绕过ASLR保护机制。
CVSS Information
N/A
Vulnerability Type
N/A