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Phusion Passenger allows remote attackers to spoof headers

Low severity GitHub Reviewed Published Oct 10, 2018 to the GitHub Advisory Database • Updated Jul 5, 2023

Package

bundler passenger (RubyGems)

Affected versions

< 4.0.60
>= 5.0.0, < 5.0.22

Patched versions

4.0.60
5.0.22

Description

agent/Core/Controller/SendRequest.cpp in Phusion Passenger before 4.0.60 and 5.0.x before 5.0.22, when used in Apache integration mode or in standalone mode without a filtering proxy, allows remote attackers to spoof headers passed to applications by using an _ (underscore) character instead of a - (dash) character in an HTTP header, as demonstrated by an X_User header.

References

Published to the GitHub Advisory Database Oct 10, 2018
Reviewed Jun 16, 2020
Last updated Jul 5, 2023

Severity

Low

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS score

0.727%
(81st percentile)

Weaknesses

CVE ID

CVE-2015-7519

GHSA ID

GHSA-fxwv-953p-7qpf

Source code

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