What’s Vulnerable › Vulnerabilities

CVE-2015-7576

• Severity: low (CVSS 3.7 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2016-02-16 · updated 2026-06-17
• Weakness: CWE-254

Description

The http_basic_authenticate_with method in actionpack/lib/action_controller/metal/http_authentication.rb in the Basic Authentication implementation in Action Controller in Ruby on Rails before 3.2.22.1, 4.0.x and 4.1.x before 4.1.14.1, 4.2.x before 4.2.5.1, and 5.x before 5.0.0.beta1.1 does not use a constant-time algorithm for verifying credentials, which makes it easier for remote attackers to bypass authentication by measuring timing differences.

Affected products

• Ruby on Rails: 4.0.0, 4.0.0-beta, 4.0.0-rc1, 4.0.0-rc2, 4.0.1, 4.0.1-rc1 (+72)
• rubyonrails Ruby On Rails: through 3.2.22; 4.0.10-rc2, 4.0.11, 4.0.11.1, 4.0.12, 4.0.13, 4.0.13-rc1 (+1)

References

• http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178043.html
• http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178047.html
• http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178067.html
• http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178068.html
• http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00053.html
• http://lists.opensuse.org/opensuse-updates/2016-02/msg00034.html
• http://lists.opensuse.org/opensuse-updates/2016-02/msg00043.html
• http://rhn.redhat.com/errata/RHSA-2016-0296.html
• http://www.debian.org/security/2016/dsa-3464
• http://www.openwall.com/lists/oss-security/2016/01/25/8
• http://www.securityfocus.com/bid/81803
• http://www.securitytracker.com/id/1034816

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