CVE-2017-8295 PoC — WordPress 安全漏洞

Title:WordPress 安全漏洞 (CVE-2017-8295)
Description:WordPress through 4.7.4 relies on the Host HTTP header for a password-reset e-mail message, which makes it easier for remote attackers to reset arbitrary passwords by making a crafted wp-login.php?action=lostpassword request and then arranging for this message to bounce or be resent, leading to transmission of the reset key to a mailbox on an attacker-controlled SMTP server. This is related to problematic use of the SERVER_NAME variable in wp-includes/pluggable.php in conjunction with the PHP mail function. Exploitation is not achievable in all cases because it requires at least one of the following: (1) the attacker can prevent the victim from receiving any e-mail messages for an extended period of time (such as 5 days), (2) the victim's e-mail system sends an autoresponse containing the original message, or (3) the victim manually composes a reply containing the original message.

# CVE-2017-8295

Wordpress has a password reset feature that contains a vulnerability which
might in some cases allow attackers to get hold of the password reset link
without previous authentication. 
Such attack could lead to an attacker gaining unauthorised access to a 
victim's WordPress account.


vulnerable Code 
------[ wp-includes/pluggable.php ]------

...

if ( !isset( $from_email ) ) {
        // Get the site domain and get rid of www.
        $sitename = strtolower( $_SERVER['SERVER_NAME'] );
        if ( substr( $sitename, 0, 4 ) == 'www.' ) {
                $sitename = substr( $sitename, 4 );
        }

        $from_email = 'wordpress@' . $sitename;
}

 [4.0K]  /data/pocs/a7232df3c3aa93f4a7cdf85847eb99f77aed5096
├── [5.6K]  CVE-2017-8295.py
├── [1.0K]  LICENSE
└── [ 676]  README.md

0 directories, 3 files