ruby: Invalid read/write in parser_yyerror function in UTF-8 parser
Published Jul 19, 2017
9.8
CRITICALCVSS 3.0
EPSS 1.68%
Description
The parser_yyerror function in the UTF-8 parser in Ruby 2.4.1 allows attackers to cause a denial of service (invalid write or read) or possibly have unspecified other impact via a crafted Ruby script, related to the parser_tokadd_utf8 function in parse.y. NOTE: this might have security relevance as a bypass of a $SAFE protection mechanism.
Affected products
No data.
No data.
CloudForms Management Engine 5
rh-ruby22-ruby
Not affected
CloudForms Management Engine 5
ruby-200-ruby
Not affected
Red Hat Enterprise Linux 5
ruby
Not affected
Red Hat Enterprise Linux 6
ruby
Not affected
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
Will not fix
Red Hat Subscription Asset Manager
ruby193-ruby
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| 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 | Not affected | n/a |
| Red Hat Enterprise Linux 6 | ruby | Not affected | 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 | Will not fix | n/a |
| Red Hat Subscription Asset Manager | ruby193-ruby | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Red Hat Product Security has rated this issue as having Low security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/. Additionally, the security impact of this flaw is disputed by the upstream Ruby project.
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:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:L/Au:N/C:P/I:P/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
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.68% (0.01677) | 76.03th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.68% (0.01677) | 75.84th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.17% (0.00171) | 54.48th | v3 (v2023.03.01) |
| Apr 25, 2024 | 0.17% (0.00171) | 53.43th | v3 (v2023.03.01) |
| Mar 15, 2024 | 0.17% (0.00165) | 52.10th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.14% (0.00144) | 49.02th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.19% (0.00188) | 55.63th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.13% (0.00133) | 46.67th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.78% (0.00777) | 21.50th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.78% (0.00777) | 0.00th | v1 |
References (6)
- https://access.redhat.com/security/cve/CVE-2017-11465 Vendor Advisory
- https://bugs.ruby-lang.org/issues/13742 x_refsource_MISCIssue TrackingPatchVendor Advisory
- https://bugs.ruby-lang.org/projects/ruby-trunk/repository/revisions/59344 x_refsource_MISCIssue TrackingPatchVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1473720 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2017-11465
- https://www.cve.org/CVERecord?id=CVE-2017-11465
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2017-11465 | Vendor Advisory | |
| https://bugs.ruby-lang.org/issues/13742 | x_refsource_MISCIssue TrackingPatchVendor Advisory | |
| https://bugs.ruby-lang.org/projects/ruby-trunk/repository/revisions/59344 | x_refsource_MISCIssue TrackingPatchVendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1473720 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-11465 | ||
| https://www.cve.org/CVERecord?id=CVE-2017-11465 |
Change history (0)
No recorded changes yet.