Vulnerability Information
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Vulnerability Title
N/A
Vulnerability Description
Race condition in the symlink function in PHP 5.1.6 and earlier allows local users to bypass the open_basedir restriction by using a combination of symlink, mkdir, and unlink functions to change the file path after the open_basedir check and before the file is opened by the underlying system, as demonstrated by symlinking a symlink into a subdirectory, to point to a parent directory via .. (dot dot) sequences, and then unlinking the resulting symlink.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
PHP符号链接绕过open_basedir功能安全限制漏洞
Vulnerability Description
PHP是广泛使用的通用目的脚本语言，特别适合于Web开发，可嵌入到HTML中。 PHP在检查和处理文件访问路径时存在漏洞，本地攻击者可能利用此漏洞非授权访问文件。 PHP的open_basedir功能可以禁止脚本访问所配置的基础目录以外的文件。这个检查是在处理文件的PHP函数在实际的打开调用发生之前执行的。在检查和实际打开调用之间有一个时间差，而攻击者可以利用这个时间差更改所检查的路径，指向open_basedir限制所禁止访问的文件。 尽管很难利用这个时间差更改路径，但攻击者可以使用symlink()函
CVSS Information
N/A
Vulnerability Type
N/A