Xdebug Remote Debugger Unauthenticated OS Command Execution
Vulnerability Description
An unauthenticated OS command injection vulnerability exists within Xdebug versions 2.5.5 and earlier, a PHP debugging extension developed by Derick Rethans. When remote debugging is enabled, Xdebug listens on port 9000 and accepts debugger protocol commands without authentication. An attacker can send a crafted eval command over this interface to execute arbitrary PHP code, which may invoke system-level functions such as system() or passthru(). This results in full compromise of the host under the privileges of the web server user.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- Ricter Zheng
References
- https://xdebug.org/
- https://kirtixs.com/blog/2015/11/13/xpwn-exploiting-xdebug-enabled-servers/
- http://web.archive.org/web/20231226215418/https://paper.seebug.org/397/
- https://www.exploit-db.com/exploits/44568
- https://www.fortiguard.com/encyclopedia/ips/46000
- https://www.vulncheck.com/advisories/xdebug-remote-debugger-unauth-os-command-execution
Affected Vendor
Xdebug
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