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Fencer Intel
low 3.7

CVE-2015-7576 json

actionpack is vulnerable to remote bypass authentication

published 2016-02-16 10 y ago modified 2026-06-17 4 mo ago also GHSA-p692-7mm3-3fxg , EUVD-2017-0280

cvss
3.7
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.9%
EPSS 4.9% chance of exploitation in 30 days, percentile 92%
public exploits
0
none known

Summary

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.

Patch / fix

  • rubygems actionpack 3.2.22.1, 4.1.14.1
  • rails Debian 14, Debian 13, Debian 12 2:4.2.5.1-1

debian advisories DEBIAN-CVE-2015-7576

  • ruby193-rubygem-actionpack RHEL 2 SOFTWARE_COLLECTIONS 1:3.2.8-16.el6
  • ruby193-rubygem-actionpack RHEL 2 SOFTWARE_COLLECTIONS 1:3.2.8-16.el7
  • ruby193-rubygem-activerecord RHEL 2 SOFTWARE_COLLECTIONS 1:3.2.8-11.el6
  • ruby193-rubygem-activerecord RHEL 2 SOFTWARE_COLLECTIONS 1:3.2.8-11.el7
  • ruby193-rubygem-activesupport RHEL 2 SOFTWARE_COLLECTIONS 1:3.2.8-6.el6
  • ruby193-rubygem-activesupport RHEL 2 SOFTWARE_COLLECTIONS 1:3.2.8-6.el7
  • ror40-rubygem-actionpack RHEL 2 SOFTWARE_COLLECTIONS 1:4.0.2-7.el6
  • ror40-rubygem-actionpack RHEL 2 SOFTWARE_COLLECTIONS 1:4.0.2-7.el7

red hat advisories RHSA-2016:0455RHSA-2016:0454RHSA-2016:0296

  • susestudio Studio Onsite Runner 1.3, Studio Onsite 1.3 1.3.14-52.1
  • qemu-ext2 Studio Onsite Runner 1.3, Studio Onsite 1.3 0.1.1-0.9.4.19
  • libjansson Studio Onsite Runner 1.3, Studio Onsite 1.3 2.2.1-0.9.11.6
  • studio-help Studio Onsite Runner 1.3, Studio Onsite 1.3 1.3.20-0.6.9
  • rubygem-bundler19 Studio Onsite Runner 1.3, Studio Onsite 1.3 1.7.0-0.13.10
  • portus SLE Module for Containers 12 2.0.3-2.4
  • rubygem-activesupport-3_2 WebYast 1.3, Studio Onsite 1.3, SLE Software Development Kit 11 SP4 +1 more 3.2.12-0.21.1
  • rubygem-activesupport-4_1 OpenStack Cloud 5 4.1.9-15.1

suse advisories SUSE-SU-2017:0475-1SUSE-SU-2016:1146-1SUSE-SU-2016:0968-1SUSE-SU-2016:0857-1SUSE-SU-2016:0858-1SUSE-SU-2016:0623-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2015-7576 updated cvss 4.3

rubygem-actionpack: Timing attack vulnerability in basic authentication in Action Controller

  • Red Hat CloudForms Management Engine 5 ruby193-rubygem-actionpack Red Hat Subscription Asset Manager rubygem-actionpack, ruby193-rubygem-actionpack
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) ror40-rubygem-actionpack 4.0.2-7.el6, ror40-rubygem-activerecord 4.0.2-6.el6, rh-ror41-rubygem-actionpack 4.1.5-3.el6, rh-ror41-rubygem-actionview 4.1.5-4.el6, ror40-rubygem-activesupport 4.0.2-4.el6, ruby193-rubygem-actionpack 3.2.8-16.el6, +5 more Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) ror40-rubygem-actionpack 4.0.2-7.el7, ror40-rubygem-activerecord 4.0.2-6.el7, rh-ror41-rubygem-actionpack 4.1.5-3.el7, rh-ror41-rubygem-actionview 4.1.5-4.el7, ror40-rubygem-activesupport 4.0.2-4.el7, ruby193-rubygem-actionpack 3.2.8-16.el7, +5 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.6) ror40-rubygem-actionpack 4.0.2-7.el6, ror40-rubygem-activerecord 4.0.2-6.el6, rh-ror41-rubygem-actionpack 4.1.5-3.el6, rh-ror41-rubygem-actionview 4.1.5-4.el6, ror40-rubygem-activesupport 4.0.2-4.el6, ruby193-rubygem-actionpack 3.2.8-16.el6, +5 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.7) ror40-rubygem-actionpack 4.0.2-7.el6, ror40-rubygem-activerecord 4.0.2-6.el6, rh-ror41-rubygem-actionpack 4.1.5-3.el6, rh-ror41-rubygem-actionview 4.1.5-4.el6, ror40-rubygem-activesupport 4.0.2-4.el6, ruby193-rubygem-actionpack 3.2.8-16.el6, +5 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.1) ror40-rubygem-actionpack 4.0.2-7.el7, ror40-rubygem-activerecord 4.0.2-6.el7, rh-ror41-rubygem-actionpack 4.1.5-3.el7, rh-ror41-rubygem-actionview 4.1.5-4.el7, ror40-rubygem-activesupport 4.0.2-4.el7, ruby193-rubygem-actionpack 3.2.8-16.el7, +5 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.2) ror40-rubygem-actionpack 4.0.2-7.el7, ror40-rubygem-activerecord 4.0.2-6.el7, rh-ror41-rubygem-actionpack 4.1.5-3.el7, rh-ror41-rubygem-actionview 4.1.5-4.el7, ror40-rubygem-activesupport 4.0.2-4.el7, ruby193-rubygem-actionpack 3.2.8-16.el7, +5 more
    +2 more products
    Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) ror40-rubygem-actionpack 4.0.2-7.el6, ror40-rubygem-activerecord 4.0.2-6.el6, rh-ror41-rubygem-actionpack 4.1.5-3.el6, rh-ror41-rubygem-actionview 4.1.5-4.el6, ror40-rubygem-activesupport 4.0.2-4.el6, ruby193-rubygem-actionpack 3.2.8-16.el6, +5 more Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) ror40-rubygem-actionpack 4.0.2-7.el7, ror40-rubygem-activerecord 4.0.2-6.el7, rh-ror41-rubygem-actionpack 4.1.5-3.el7, rh-ror41-rubygem-actionview 4.1.5-4.el7, ror40-rubygem-activesupport 4.0.2-4.el7, ruby193-rubygem-actionpack 3.2.8-16.el7, +5 more
    fixed: vendor fix RHSA-2016:0296

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

4.88% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 3.7 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:P/I:N/A:N
GitHub 3.0 3.7 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
rubygems actionpack
>=3.1.0, <3.2.22.1
>=4.0.0, <4.1.14.1
3.2.22.1
4.1.14.1

Classification

Weakness
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.