ruby: Unsafe parsing of long strings via decode_www_form_component method
Published Sep 6, 2017
7.5
HIGHCVSS 3.0
EPSS 4.13%
Description
The URI.decode_www_form_component method in Ruby before 1.9.2-p330 allows remote attackers to cause a denial of service (catastrophic regular expression backtracking, resource consumption, or application crash) via a crafted string.
Affected products
No data.
No data.
Red Hat Hardened Images
ruby3-3-main-3.3.10-23.1.hum1
Fixed · RHSA-2026:7305
Red Hat Hardened Images
ruby3-4-main-3.4.8-31.1.hum1
Fixed · RHSA-2026:7307
Red Hat Hardened Images
ruby4-0-main-4.0.0-33.3.hum1
Fixed · RHSA-2026:8838
CloudForms Management Engine 5
rh-ruby22-ruby
Not affected
CloudForms Management Engine 5
ruby-200-ruby
Not affected
Red Hat Enterprise Linux 5
ruby
Will not fix
Red Hat Enterprise Linux 6
ruby
Will not fix
Red Hat Enterprise Linux 7
ruby
Not affected
Red Hat Software Collections
rh-ruby22-ruby
Not affected
Red Hat Software Collections
rh-ruby23-ruby
Not affected
Red Hat Software Collections
rh-ruby24-ruby
Not affected
Red Hat Subscription Asset Manager
ruby193-ruby
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Hardened Images | ruby3-3-main-3.3.10-23.1.hum1 | Fixed | RHSA-2026:7305 |
| Red Hat Hardened Images | ruby3-4-main-3.4.8-31.1.hum1 | Fixed | RHSA-2026:7307 |
| Red Hat Hardened Images | ruby4-0-main-4.0.0-33.3.hum1 | Fixed | RHSA-2026:8838 |
| CloudForms Management Engine 5 | rh-ruby22-ruby | Not affected | n/a |
| CloudForms Management Engine 5 | ruby-200-ruby | Not affected | n/a |
| Red Hat Enterprise Linux 5 | ruby | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | ruby | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | ruby | Not affected | n/a |
| Red Hat Software Collections | rh-ruby22-ruby | Not affected | n/a |
| Red Hat Software Collections | rh-ruby23-ruby | Not affected | n/a |
| Red Hat Software Collections | rh-ruby24-ruby | Not affected | n/a |
| Red Hat Subscription Asset Manager | ruby193-ruby | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.13% (0.04128) | 90.50th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.13% (0.04128) | 89.47th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.58% (0.00577) | 66.25th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.18% (0.02178) | 73.88th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.58% (0.00577) | 66.92th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.57% (0.00568) | 78.55th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.57% (0.00568) | 77.13th | v3 (v2023.03.01) |
| Jun 22, 2023 | 0.57% (0.00568) | 74.68th | v3 (v2023.03.01) |
| Mar 9, 2023 | 0.66% (0.00661) | 76.47th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.69% (0.00688) | 77.01th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.21% (0.01213) | 66.61th | v2 (v2022.01.01) |
| Feb 17, 2023 | 1.21% (0.01213) | 66.22th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.21% (0.01213) | 64.21th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.21% (0.01213) | 40.54th | v2 (v2022.01.01) |
References (8)
- http://www.openwall.com/lists/oss-security/2015/07/13/6 mailing-listx_refsource_MLISTMailing ListVDB Entry
- http://www.securitytracker.com/id/1032874 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2014-6438 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1490845 Issue Tracking
- https://github.com/ruby/www.ruby-lang.org/issues/817 x_refsource_CONFIRMThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2014-6438
- https://www.cve.org/CVERecord?id=CVE-2014-6438
- https://www.ruby-lang.org/en/news/2014/08/19/ruby-1-9-2-p330-released/ x_refsource_CONFIRMPatchRelease NotesVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2015/07/13/6 | mailing-listx_refsource_MLISTMailing ListVDB Entry | |
| http://www.securitytracker.com/id/1032874 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2014-6438 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1490845 | Issue Tracking | |
| https://github.com/ruby/www.ruby-lang.org/issues/817 | x_refsource_CONFIRMThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2014-6438 | ||
| https://www.cve.org/CVERecord?id=CVE-2014-6438 | ||
| https://www.ruby-lang.org/en/news/2014/08/19/ruby-1-9-2-p330-released/ | x_refsource_CONFIRMPatchRelease NotesVendor Advisory |
Change history (0)
No recorded changes yet.