CVE-2015-7519

Severity: low (CVSS 3.7 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-01-08 · updated 2026-06-17
Weakness: CWE-20

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.

Affected products

Phusionpassenger Phusion Passenger: through 4.0.59; 5.0.0, 5.0.0-beta1, 5.0.0-beta2, 5.0.0-beta3, 5.0.0-rc1, 5.0.0-rc2 (+21)

References

http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00024.html
http://www.openwall.com/lists/oss-security/2015/12/07/1
http://www.openwall.com/lists/oss-security/2015/12/07/2
https://blog.phusion.nl/2015/12/07/cve-2015-7519/
https://bugzilla.suse.com/show_bug.cgi?id=956281
https://github.com/phusion/passenger/commit/ddb8ecc4ebf260e4967f57f271d4f5761abeac3e
https://lists.debian.org/debian-lts-announce/2018/06/msg00007.html
https://puppet.com/security/cve/passenger-dec-2015-security-fixes
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00024.html
http://www.openwall.com/lists/oss-security/2015/12/07/1
http://www.openwall.com/lists/oss-security/2015/12/07/2
https://blog.phusion.nl/2015/12/07/cve-2015-7519/

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