Memory leak in the zlib_stateful_finish function in crypto/comp/c_zlib.c in OpenSSL 0.9.8l and earlier and 1.0.0 Beta through Beta 4 allows remote attackers to cause a denial of service (memory consumption) via vectors that trigger incorrect calls to the CRYPTO_cleanup_all_ex_data function, as demonstrated by use of SSLv3 and PHP with the Apache HTTP Server, a related issue to CVE-2008-1678.
総合評価: CVE-2009-4355 は中リスク（48.1/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 8.94%、95 パーセンタイル） 根拠: EPSS 上、短期間での悪用可能性は高い水準です。 推奨対応: 悪用可能性が高いため、影響範囲の確認と修補の優先付けを推奨します。
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 | 20.24% | 8.94% | -11.30% |
| 2 | 2026-03-04 | 5.67% | 20.24% | +14.57% |
| 3 | 2026-03-01 | — | 5.67% | — |
EPSS の全履歴 （全 49 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 |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
low | CVE-2009-4355 low priority: Debian including 1 source packages (openssl), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2009-4355 |
gentoo
|
high | CVE-2009-4355: 1 GLSA(s) (201110-01), 1 atom(s) (dev-libs/openssl); latest impact high. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2009-4355 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2009-4355 |
ubuntu
|
medium | CVE-2009-4355 medium priority: Ubuntu including 1 source packages (openssl), 6 status rows across 6 suites (dapper, hardy, intrepid, jaunty, karmic, upstream): released 5, needs-triage 1. | https://ubuntu.com/security/CVE-2009-4355 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| openssl | openssl | <= 0.9.8l | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.1c | cpe:2.3:a:openssl:openssl:0.9.1c:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.2b | cpe:2.3:a:openssl:openssl:0.9.2b:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.3 | cpe:2.3:a:openssl:openssl:0.9.3:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.3a | cpe:2.3:a:openssl:openssl:0.9.3a:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.4 | cpe:2.3:a:openssl:openssl:0.9.4:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.5 | cpe:2.3:a:openssl:openssl:0.9.5:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.5 | cpe:2.3:a:openssl:openssl:0.9.5:beta1:*:*:*:*:*:* |
| openssl | openssl | 0.9.5 | cpe:2.3:a:openssl:openssl:0.9.5:beta2:*:*:*:*:*:* |
| openssl | openssl | 0.9.5a | cpe:2.3:a:openssl:openssl:0.9.5a:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.5a | cpe:2.3:a:openssl:openssl:0.9.5a:beta1:*:*:*:*:*:* |
| openssl | openssl | 0.9.5a | cpe:2.3:a:openssl:openssl:0.9.5a:beta2:*:*:*:*:*:* |
| openssl | openssl | 0.9.6 | cpe:2.3:a:openssl:openssl:0.9.6:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.6 | cpe:2.3:a:openssl:openssl:0.9.6:beta1:*:*:*:*:*:* |
| openssl | openssl | 0.9.6 | cpe:2.3:a:openssl:openssl:0.9.6:beta2:*:*:*:*:*:* |
| openssl | openssl | 0.9.6 | cpe:2.3:a:openssl:openssl:0.9.6:beta3:*:*:*:*:*:* |
| openssl | openssl | 0.9.6a | cpe:2.3:a:openssl:openssl:0.9.6a:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.6a | cpe:2.3:a:openssl:openssl:0.9.6a:beta1:*:*:*:*:*:* |
| openssl | openssl | 0.9.6a | cpe:2.3:a:openssl:openssl:0.9.6a:beta2:*:*:*:*:*:* |
| openssl | openssl | 0.9.6a | cpe:2.3:a:openssl:openssl:0.9.6a:beta3:*:*:*:*:*:* |
| openssl | openssl | 0.9.6b | cpe:2.3:a:openssl:openssl:0.9.6b:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.6c | cpe:2.3:a:openssl:openssl:0.9.6c:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.6d | cpe:2.3:a:openssl:openssl:0.9.6d:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.6e | cpe:2.3:a:openssl:openssl:0.9.6e:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.6f | cpe:2.3:a:openssl:openssl:0.9.6f:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.6g | cpe:2.3:a:openssl:openssl:0.9.6g:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.6h | cpe:2.3:a:openssl:openssl:0.9.6h:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.6i | cpe:2.3:a:openssl:openssl:0.9.6i:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.6j | cpe:2.3:a:openssl:openssl:0.9.6j:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.6k | cpe:2.3:a:openssl:openssl:0.9.6k:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.6l | cpe:2.3:a:openssl:openssl:0.9.6l:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.6m | cpe:2.3:a:openssl:openssl:0.9.6m:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.7 | cpe:2.3:a:openssl:openssl:0.9.7:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.7 | cpe:2.3:a:openssl:openssl:0.9.7:beta1:*:*:*:*:*:* |
| openssl | openssl | 0.9.7 | cpe:2.3:a:openssl:openssl:0.9.7:beta2:*:*:*:*:*:* |
| openssl | openssl | 0.9.7 | cpe:2.3:a:openssl:openssl:0.9.7:beta3:*:*:*:*:*:* |
| openssl | openssl | 0.9.7 | cpe:2.3:a:openssl:openssl:0.9.7:beta4:*:*:*:*:*:* |
| openssl | openssl | 0.9.7 | cpe:2.3:a:openssl:openssl:0.9.7:beta5:*:*:*:*:*:* |
| openssl | openssl | 0.9.7 | cpe:2.3:a:openssl:openssl:0.9.7:beta6:*:*:*:*:*:* |
| openssl | openssl | 0.9.7a | cpe:2.3:a:openssl:openssl:0.9.7a:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.7b | cpe:2.3:a:openssl:openssl:0.9.7b:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.7c | cpe:2.3:a:openssl:openssl:0.9.7c:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.7d | cpe:2.3:a:openssl:openssl:0.9.7d:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.7e | cpe:2.3:a:openssl:openssl:0.9.7e:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.7f | cpe:2.3:a:openssl:openssl:0.9.7f:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.7g | cpe:2.3:a:openssl:openssl:0.9.7g:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.7h | cpe:2.3:a:openssl:openssl:0.9.7h:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.7i | cpe:2.3:a:openssl:openssl:0.9.7i:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.7j | cpe:2.3:a:openssl:openssl:0.9.7j:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.7k | cpe:2.3:a:openssl:openssl:0.9.7k:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.7l | cpe:2.3:a:openssl:openssl:0.9.7l:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.7m | cpe:2.3:a:openssl:openssl:0.9.7m:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.8 | cpe:2.3:a:openssl:openssl:0.9.8:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.8a | cpe:2.3:a:openssl:openssl:0.9.8a:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.8b | cpe:2.3:a:openssl:openssl:0.9.8b:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.8c | cpe:2.3:a:openssl:openssl:0.9.8c:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.8d | cpe:2.3:a:openssl:openssl:0.9.8d:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.8e | cpe:2.3:a:openssl:openssl:0.9.8e:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.8f | cpe:2.3:a:openssl:openssl:0.9.8f:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.8g | cpe:2.3:a:openssl:openssl:0.9.8g:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.8h | cpe:2.3:a:openssl:openssl:0.9.8h:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.8i | cpe:2.3:a:openssl:openssl:0.9.8i:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.8j | cpe:2.3:a:openssl:openssl:0.9.8j:*:*:*:*:*:*:* |
| openssl | openssl | 0.9.8k | cpe:2.3:a:openssl:openssl:0.9.8k:*:*:*:*:*:*:* |
| redhat | openssl | 0.9.6-15 | cpe:2.3:a:redhat:openssl:0.9.6-15:*:*:*:*:*:*:* |
| redhat | openssl | 0.9.6b-3 | cpe:2.3:a:redhat:openssl:0.9.6b-3:*:*:*:*:*:*:* |
| redhat | openssl | 0.9.7a-2 | cpe:2.3:a:redhat:openssl:0.9.7a-2:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.0 | cpe:2.3:a:openssl:openssl:1.0.0:beta1:*:*:*:*:*:* |
| openssl | openssl | 1.0.0 | cpe:2.3:a:openssl:openssl:1.0.0:beta2:*:*:*:*:*:* |
| openssl | openssl | 1.0.0 | cpe:2.3:a:openssl:openssl:1.0.0:beta3:*:*:*:*:*:* |
| openssl | openssl | 1.0.0 | cpe:2.3:a:openssl:openssl:1.0.0:beta4:*:*:*:*:*:* |