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.
総合評価: CVE-2013-4073 は中リスク（56.6/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 2.74%、84 パーセンタイル） 推奨対応: 影響資産を整理し、修補計画に組み込んでください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置（高いほど相対的に深刻）を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ（新 − 旧） |
|---|---|---|---|---|
| 1 | 2026-06-15 | 2.83% | 2.74% | -0.09% |
| 2 | 2026-06-04 | 3.66% | 2.83% | -0.83% |
| 3 | 2026-06-03 | — | 3.66% | — |
EPSS の全履歴 （全 22 件）
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 6.8 | 2.0 | MEDIUM |
|
8.6 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2013-4073 unimportant priority: Debian including 1 source packages (puppet), 1 status rows across 1 suites (bullseye): resolved 1. | https://security-tracker.debian.org/tracker/CVE-2013-4073 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2013-4073 |
ubuntu
|
medium | CVE-2013-4073 medium priority: Ubuntu including 2 source packages (ruby1.8, ruby1.9.1), 10 status rows across 5 suites (lucid, precise, quantal, raring, upstream): released 8, ignored 2. | https://ubuntu.com/security/CVE-2013-4073 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| ruby-lang | ruby | 1.8.6-26 | cpe:2.3:a:ruby-lang:ruby:1.8.6-26:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p160:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p17:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p173:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p174:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p22:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p248:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p249:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p299:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p301:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p302:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p330:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p334:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p352:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p357:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p358:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p370:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p371:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p373:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p71:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:p72:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:preview1:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:preview2:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:preview3:*:*:*:*:*:* |
| ruby-lang | ruby | 1.8.7 | cpe:2.3:a:ruby-lang:ruby:1.8.7:preview4:*:*:*:*:*:* |
| ruby-lang | ruby | 1.9.3 | cpe:2.3:a:ruby-lang:ruby:1.9.3:*:*:*:*:*:*:* |
| ruby-lang | ruby | 1.9.3 | cpe:2.3:a:ruby-lang:ruby:1.9.3:p0:*:*:*:*:*:* |
| ruby-lang | ruby | 1.9.3 | cpe:2.3:a:ruby-lang:ruby:1.9.3:p125:*:*:*:*:*:* |
| ruby-lang | ruby | 1.9.3 | cpe:2.3:a:ruby-lang:ruby:1.9.3:p194:*:*:*:*:*:* |
| ruby-lang | ruby | 1.9.3 | cpe:2.3:a:ruby-lang:ruby:1.9.3:p286:*:*:*:*:*:* |
| ruby-lang | ruby | 1.9.3 | cpe:2.3:a:ruby-lang:ruby:1.9.3:p383:*:*:*:*:*:* |
| ruby-lang | ruby | 1.9.3 | cpe:2.3:a:ruby-lang:ruby:1.9.3:p385:*:*:*:*:*:* |
| ruby-lang | ruby | 1.9.3 | cpe:2.3:a:ruby-lang:ruby:1.9.3:p392:*:*:*:*:*:* |
| ruby-lang | ruby | 1.9.3 | cpe:2.3:a:ruby-lang:ruby:1.9.3:p426:*:*:*:*:*:* |
| ruby-lang | ruby | 1.9.3 | cpe:2.3:a:ruby-lang:ruby:1.9.3:p429:*:*:*:*:*:* |
| ruby-lang | ruby | 2.0.0 | cpe:2.3:a:ruby-lang:ruby:2.0.0:p0:*:*:*:*:*:* |
| ruby-lang | ruby | 2.0.0 | cpe:2.3:a:ruby-lang:ruby:2.0.0:p195:*:*:*:*:*:* |
| ruby-lang | ruby | 2.0.0 | cpe:2.3:a:ruby-lang:ruby:2.0.0:preview1:*:*:*:*:*:* |
| ruby-lang | ruby | 2.0.0 | cpe:2.3:a:ruby-lang:ruby:2.0.0:preview2:*:*:*:*:*:* |
| ruby-lang | ruby | 2.0.0 | cpe:2.3:a:ruby-lang:ruby:2.0.0:rc1:*:*:*:*:*:* |
| ruby-lang | ruby | 2.0.0 | cpe:2.3:a:ruby-lang:ruby:2.0.0:rc2:*:*:*:*:*:* |