ruby: hostname check bypassing vulnerability in SSL client
Published Aug 18, 2013
6.8
MEDIUMCVSS 2.0
EPSS 2.76%
Description
The OpenSSL::SSL.verify_certificate_identity function in lib/openssl/ssl.rb in Ruby 1.8 before 1.8.7-p374, 1.9 before 1.9.3-p448, and 2.0 before 2.0.0-p247 does not properly handle a '\0' character in a domain name in the Subject Alternative Name field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.
Affected products
No data.
- 1.8.6-26
- 1.8.7
- 1.8.7
- 1.8.7
- 1.8.7
- 1.8.7
- 1.8.7
- 1.8.7
- 1.8.7
- 1.8.7
- 1.8.7
- 1.8.7
- 1.8.7
- 1.8.7
- 1.8.7
- 1.8.7
- 1.8.7
- 1.8.7
- 1.8.7
- 1.8.7
- 1.8.7
- 1.8.7
- 1.8.7
- 1.8.7
- 1.8.7
- 1.8.7
- 1.9.3
- 1.9.3
- 1.9.3
- 1.9.3
- 1.9.3
- 1.9.3
- 1.9.3
- 1.9.3
- 1.9.3
- 1.9.3
- 2.0.0
- 2.0.0
- 2.0.0
- 2.0.0
- 2.0.0
- 2.0.0
No data.
OpenStack 3 for RHEL 6
ruby193-ruby-0:1.9.3.429-34.2.el6ost
Fixed · RHSA-2013:1103
RHEL 6 Version of OpenShift Enterprise 1.2
ruby193-ruby-0:1.9.3.448-38.el6
Fixed · RHSA-2013:1137
Red Hat Enterprise Linux 5
ruby-0:1.8.5-31.el5_9
Fixed · RHSA-2013:1090
Red Hat Enterprise Linux 6
ruby-0:1.8.7.352-12.el6_4
Fixed · RHSA-2013:1090
Red Hat Enterprise Linux 7
ruby
Not affected
Red Hat JBoss SOA Platform 4
jruby
Will not fix
Red Hat JBoss SOA Platform 5
jruby
Will not fix
Red Hat Software Collections
ruby193-ruby
Affected
Red Hat Subscription Asset Manager
ruby193-ruby
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| OpenStack 3 for RHEL 6 | ruby193-ruby-0:1.9.3.429-34.2.el6ost | Fixed | RHSA-2013:1103 |
| RHEL 6 Version of OpenShift Enterprise 1.2 | ruby193-ruby-0:1.9.3.448-38.el6 | Fixed | RHSA-2013:1137 |
| Red Hat Enterprise Linux 5 | ruby-0:1.8.5-31.el5_9 | Fixed | RHSA-2013:1090 |
| Red Hat Enterprise Linux 6 | ruby-0:1.8.7.352-12.el6_4 | Fixed | RHSA-2013:1090 |
| Red Hat Enterprise Linux 7 | ruby | Not affected | n/a |
| Red Hat JBoss SOA Platform 4 | jruby | Will not fix | n/a |
| Red Hat JBoss SOA Platform 5 | jruby | Will not fix | n/a |
| Red Hat Software Collections | ruby193-ruby | Affected | n/a |
| Red Hat Subscription Asset Manager | ruby193-ruby | 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.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/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
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 | 2.76% (0.02757) | 85.72th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.74% (0.02744) | 84.20th | v5 (v2026.06.15) |
| Jun 3, 2026 | 3.66% (0.03664) | 88.10th | v4 (v2025.03.14) |
| Jun 2, 2026 | 5.08% (0.05083) | 89.96th | v4 (v2025.03.14) |
| Mar 30, 2025 | 2.39% (0.02394) | 83.60th | v4 (v2025.03.14) |
| Mar 29, 2025 | 5.71% (0.05712) | 83.64th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.39% (0.02394) | 83.93th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.14% (0.00142) | 51.47th | v3 (v2023.03.01) |
| Jul 11, 2024 | 0.14% (0.00142) | 50.35th | v3 (v2023.03.01) |
| Mar 30, 2023 | 0.14% (0.00142) | 48.34th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.16% (0.00162) | 51.09th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.69% (0.02686) | 82.85th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.69% (0.02686) | 81.17th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.69% (0.02686) | 62.66th | v2 (v2022.01.01) |
References (17)
- http://forums.interworx.com/threads/8000-InterWorx-Version-5-0-14-Released-on-Beta-Channel%21 x_refsource_CONFIRM
- http://lists.apple.com/archives/security-announce/2013/Oct/msg00004.html vendor-advisoryx_refsource_APPLE
- http://lists.opensuse.org/opensuse-updates/2013-07/msg00042.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-updates/2013-07/msg00044.html vendor-advisoryx_refsource_SUSE
- http://rhn.redhat.com/errata/RHSA-2013-1090.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2013-1103.html vendor-advisoryx_refsource_REDHAT
- http://rhn.redhat.com/errata/RHSA-2013-1137.html vendor-advisoryx_refsource_REDHAT
- http://support.apple.com/kb/HT6150 x_refsource_CONFIRM
- http://www.debian.org/security/2013/dsa-2738 vendor-advisoryx_refsource_DEBIAN
- http://www.debian.org/security/2013/dsa-2809 vendor-advisoryx_refsource_DEBIAN
- http://www.ruby-lang.org/en/news/2013/06/27/hostname-check-bypassing-vulnerability-in-openssl-client-cve-2013-4073/ x_refsource_CONFIRMVendor Advisory
- http://www.ubuntu.com/usn/USN-1902-1 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2013-4073 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=979251 x_refsource_CONFIRMIssue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2013-4073
- https://puppet.com/security/cve/cve-2013-4073 x_refsource_CONFIRM
- https://www.cve.org/CVERecord?id=CVE-2013-4073
Change history (0)
No recorded changes yet.