wolfSSL SP Math All RSA implementation is vulnerable to the Marvin Attack, new variation of a timing Bleichenbacher style attack, when built with the following options to configure: --enable-all CFLAGS="-DWOLFSSL_STATIC_RSA" The define “WOLFSSL_STATIC_RSA” enables static RSA cipher suites, which is not recommended, and has been disabled by default since wolfSSL 3.6.6. Therefore the default build since 3.6.6, even with "--enable-all", is not vulnerable to the Marvin Attack. The vulnerability is specific to static RSA cipher suites, and expected to be padding-independent. The vulnerability allows an attacker to decrypt ciphertexts and forge signatures after probing with a large number of test observations. However the server’s private key is not exposed.
総合評価: CVE-2023-6935 は低リスク（38.1/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 0.54%、41 パーセンタイル） 推奨対応: 悪用情報と EPSS の推移を監視し、必要に応じて優先度を見直してください。
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 | 0.32% | 0.54% | +0.22% |
| 2 | 2026-01-27 | 0.20% | 0.32% | +0.11% |
| 3 | 2026-01-21 | — | 0.20% | — |
EPSS の全履歴 （全 14 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] |
| 5.9 | 3.1 | MEDIUM |
|
2.2 | 3.6 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
medium | CVE-2023-6935: 1 source package rows (wolfssl); 15 state rows across 5 repos (3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 5, open 10. | https://security.alpinelinux.org/vuln/CVE-2023-6935 |
debian
|
unimportant | CVE-2023-6935 unimportant priority: Debian including 1 source packages (wolfssl), 4 status rows across 4 suites (bookworm, bullseye, sid, trixie): open 2, resolved 2. | https://security-tracker.debian.org/tracker/CVE-2023-6935 |
ubuntu
|
medium | CVE-2023-6935 medium priority: Ubuntu including 1 source packages (wolfssl), 12 status rows across 12 suites (bionic, focal, jammy, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): needs-triage 4, not-affected 4, ignored 3, released 1. | https://ubuntu.com/security/CVE-2023-6935 |
| URL | タグ |
|---|---|
| https://people.redhat.com/~hkario/marvin/ | Technical Description |
| https://www.wolfssl.com/docs/security-vulnerabilities/ | Vendor Advisory |