The X509_cmp_time function in crypto/x509/x509_vfy.c in OpenSSL before 0.9.8zg, 1.0.0 before 1.0.0s, 1.0.1 before 1.0.1n, and 1.0.2 before 1.0.2b allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via a crafted length field in ASN1_TIME data, as demonstrated by an attack against a server that supports client authentication with a custom verification callback.
総合評価: CVE-2015-1789 は高リスク（69.8/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 74.48%、99 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。 直近 1 日で EPSS が +69.95% 上昇。悪用への関心が高まっている可能性があります。 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 | 4.53% | 74.48% | +69.95% |
| 2 | 2026-04-27 | 3.39% | 4.53% | +1.14% |
| 3 | 2026-03-04 | — | 3.39% | — |
EPSS の全履歴 （全 48 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 |
|---|---|---|---|---|---|---|
| 7.5 | 3.0 | HIGH |
|
3.9 | 3.6 | [email protected] |
| 4.3 | 2.0 | MEDIUM |
|
8.6 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2015-1789 not yet assigned 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-2015-1789 |
gentoo
|
normal | CVE-2015-1789: 1 GLSA(s) (201506-02), 1 atom(s) (dev-libs/openssl); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2015-1789 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2015-1789 |
suse
|
high | — | https://www.suse.com/security/cve/CVE-2015-1789/ |
ubuntu
|
medium | CVE-2015-1789 medium priority: Ubuntu including 2 source packages (openssl, openssl098), 26 status rows across 13 suites (artful, bionic, cosmic, disco, precise, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): released 12, DNE 9, ignored 3, needs-triage 2. | https://ubuntu.com/security/CVE-2015-1789 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| openssl | openssl | <= 0.9.8zf | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.0 | cpe:2.3:a:openssl:openssl:1.0.0:*:*:*:*:*:*:* |
| 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:*:*:*:*:*:* |
| openssl | openssl | 1.0.0 | cpe:2.3:a:openssl:openssl:1.0.0:beta5:*:*:*:*:*:* |
| openssl | openssl | 1.0.0a | cpe:2.3:a:openssl:openssl:1.0.0a:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.0b | cpe:2.3:a:openssl:openssl:1.0.0b:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.0c | cpe:2.3:a:openssl:openssl:1.0.0c:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.0d | cpe:2.3:a:openssl:openssl:1.0.0d:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.0e | cpe:2.3:a:openssl:openssl:1.0.0e:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.0f | cpe:2.3:a:openssl:openssl:1.0.0f:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.0g | cpe:2.3:a:openssl:openssl:1.0.0g:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.0h | cpe:2.3:a:openssl:openssl:1.0.0h:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.0i | cpe:2.3:a:openssl:openssl:1.0.0i:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.0j | cpe:2.3:a:openssl:openssl:1.0.0j:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.0k | cpe:2.3:a:openssl:openssl:1.0.0k:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.0l | cpe:2.3:a:openssl:openssl:1.0.0l:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.0m | cpe:2.3:a:openssl:openssl:1.0.0m:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.0n | cpe:2.3:a:openssl:openssl:1.0.0n:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.0o | cpe:2.3:a:openssl:openssl:1.0.0o:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.0p | cpe:2.3:a:openssl:openssl:1.0.0p:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.0q | cpe:2.3:a:openssl:openssl:1.0.0q:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.0r | cpe:2.3:a:openssl:openssl:1.0.0r:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.1 | cpe:2.3:a:openssl:openssl:1.0.1:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.1 | cpe:2.3:a:openssl:openssl:1.0.1:beta1:*:*:*:*:*:* |
| openssl | openssl | 1.0.1 | cpe:2.3:a:openssl:openssl:1.0.1:beta2:*:*:*:*:*:* |
| openssl | openssl | 1.0.1 | cpe:2.3:a:openssl:openssl:1.0.1:beta3:*:*:*:*:*:* |
| openssl | openssl | 1.0.1a | cpe:2.3:a:openssl:openssl:1.0.1a:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.1b | cpe:2.3:a:openssl:openssl:1.0.1b:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.1c | cpe:2.3:a:openssl:openssl:1.0.1c:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.1d | cpe:2.3:a:openssl:openssl:1.0.1d:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.1e | cpe:2.3:a:openssl:openssl:1.0.1e:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.1f | cpe:2.3:a:openssl:openssl:1.0.1f:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.1g | cpe:2.3:a:openssl:openssl:1.0.1g:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.1h | cpe:2.3:a:openssl:openssl:1.0.1h:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.1i | cpe:2.3:a:openssl:openssl:1.0.1i:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.1j | cpe:2.3:a:openssl:openssl:1.0.1j:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.1k | cpe:2.3:a:openssl:openssl:1.0.1k:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.1l | cpe:2.3:a:openssl:openssl:1.0.1l:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.1m | cpe:2.3:a:openssl:openssl:1.0.1m:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.2 | cpe:2.3:a:openssl:openssl:1.0.2:*:*:*:*:*:*:* |
| openssl | openssl | 1.0.2 | cpe:2.3:a:openssl:openssl:1.0.2:beta1:*:*:*:*:*:* |
| openssl | openssl | 1.0.2a | cpe:2.3:a:openssl:openssl:1.0.2a:*:*:*:*:*:*:* |
| oracle | sparc-opl_service_processor | <= 1121 | cpe:2.3:a:oracle:sparc-opl_service_processor:*:*:*:*:*:*:*:* |