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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Xdebug Xdebug
Default version status: unaffected
0 to ≤ 2.5.5affected
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 ↗