漏洞信息
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Vulnerability Title
elFinder: SSRF protection bypass via DNS rebinding in the `fsock_get_contents()` fallback
Vulnerability Description
elFinder is an open-source file manager for web, written in JavaScript using jQuery UI. Prior to 2.1.70, elFinder URL uploads in php/elFinder.class.php can bypass server-side request forgery protections when PHP cURL is unavailable because validate_address() validates $info['ip'], but get_remote_contents() selects fsock_get_contents(), which connects to $arr['host'] and performs a second DNS resolution. An attacker able to submit a URL upload can use DNS rebinding to have the first resolution return a public address and the connection resolution return a loopback or private address, causing the internal HTTP response body to be stored as an uploaded file and made readable through elFinder. After a successful fetch, get_headers($url, true) separately requests the original hostname without reusing the validated and pinned connection, creating an additional blind server-side request forgery path even when curl_get_contents() is selected. This issue is fixed in version 2.1.70.
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Vulnerability Type
服务端请求伪造(SSRF)
Vulnerability Title
Studio 42 elFinder 服务端请求伪造漏洞
Vulnerability Description
Studio 42 elFinder是Studio 42团队的一款基于Web的文件管理组件。 Studio 42 elFinder 2.1.70之前版本存在服务端请求伪造漏洞,该漏洞源于在PHP cURL不可用时,URL上传功能中validate_address()与get_remote_contents()对主机名进行二次DNS解析,可被DNS重绑定绕过服务端请求伪造保护,导致内部HTTP响应体被存储为可读文件,并可能造成盲服务端请求伪造。
CVSS Information
N/A
Vulnerability Type
N/A