Summary #

Invicti identified a version disclosure (Phusion Passenger) in the target web server's HTTP response. Phusion Passenger is a free web server and application server with support for Ruby, Python, and Node.js.

This information can help an attacker gain a greater understanding of the systems in use and potentially develop further attacks targeted at the specific version of Phusion Passenger.

Impact #
An attacker might use the disclosed information to harvest specific security vulnerabilities for the version identified.
Remediation #

Configure Phusion Passenger to prevent version to prevent information leakage from X-Powered-By header by setting:

passenger_show_version_in_header off;

Classifications #
CAPEC-170; CWE-205; HIPAA-164.306(a), 164.308(a); ISO27001-A.18.1.3; WASC-13; OWASP 2013-A5; OWASP 2017-A6
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