There is a carry propagating bug in the Broadwell-specific Montgomery multiplication procedure in OpenSSL 1.0.2 and 1.1.0 before 1.1.0c that handles input lengths divisible by, but longer than 256 bits. Analysis suggests that attacks against RSA, DSA and DH private keys are impossible. This is because the subroutine in question is not used in operations with the private key itself and an input of the attacker's direct choice. Otherwise the bug can manifest itself as transient authentication and key negotiation failures or reproducible erroneous outcome of public-key operations with specially crafted input. Among EC algorithms only Brainpool P-512 curves are affected and one presumably can attack ECDH key negotiation. Impact was not analyzed in detail, because pre-requisites for attack are considered unlikely. Namely multiple clients have to choose the curve in question and the server has to share the private key among them, neither of which is default behaviour. Even then only clients that chose the curve will be affected.
総合評価: CVE-2016-7055 は中リスク（57.1/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 14.22%、96 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 | 2026-06-25 | 14.34% | 14.22% | -0.11% |
| 2 | 2026-06-15 | 2.69% | 14.34% | +11.65% |
| 3 | 2026-05-24 | — | 2.69% | — |
EPSS の全履歴 （全 30 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 |
|---|---|---|---|---|---|---|
| 5.9 | 3.1 | MEDIUM |
|
2.2 | 3.6 | [email protected] |
| 2.6 | 2.0 | LOW |
|
4.9 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
low | CVE-2016-7055 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-2016-7055 |
gentoo
|
normal | CVE-2016-7055: 1 GLSA(s) (201702-07), 1 atom(s) (dev-libs/openssl); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2016-7055 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2016-7055 |
suse
|
medium | CVE-2016-7055 severity moderate: SUSE including 467 source package names (0.9.1:libopenssl1_0_0-1.0.2j-59.1, 0.9.1:openssl-1.0.2j-59.1, …), 729 product×package rows across 94 product lines (Container caasp/v4/default-http-backend, Container caasp/v4/dnsmasq-nanny, … (94 product lines)): Fixed 377, Known Not Affected 195, Known Affected 157. | https://www.suse.com/security/cve/CVE-2016-7055/ |
ubuntu
|
low | CVE-2016-7055 low priority: Ubuntu including 2 source packages (openssl, openssl098), 10 status rows across 5 suites (precise, trusty, upstream, xenial, yakkety): not-affected 4, DNE 3, released 2, needs-triage 1. | https://ubuntu.com/security/CVE-2016-7055 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| openssl | openssl | >= 1.0.2, < 1.0.2k | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
| openssl | openssl | >= 1.1.0, < 1.1.0c | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
| nodejs | node.js | >= 4.0.0, <= 4.1.2 | cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* |
| nodejs | node.js | >= 4.2.0, < 4.7.3 | cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:* |
| nodejs | node.js | >= 6.0.0, <= 6.8.1 | cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* |
| nodejs | node.js | >= 6.9.0, < 6.9.5 | cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:* |
| nodejs | node.js | >= 7.0.0, < 7.5.0 | cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* |