An issue was discovered in Yubico libykpiv before 2.1.0. lib/util.c in this library (which is included in yubico-piv-tool) does not properly check embedded length fields during device communication. A malicious PIV token can misreport the returned length fields during RSA key generation. This will cause stack memory to be copied into heap allocated memory that gets returned to the caller. The leaked memory could include PINs, passwords, key material, and other sensitive information depending on the integration. During further processing by the caller, this information could leak across trust boundaries. Note that RSA key generation is triggered by the host and cannot directly be triggered by the token.
総合評価: CVE-2020-13131 は公開エクスプロイトあり(50/100)。CVSS 深刻度は中。悪用される可能性が高い(EPSS 0.49%、38 パーセンタイル) 根拠: 公開エクスプロイトが 1 件参照されています(Exploit-DB)。 推奨対応: 公開エクスプロイトが確認されています。影響範囲の確認、緩和策の適用、パッチ適用を優先してください。
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。
| EDB-ID | ソース | 種別 | 公開 | リンク |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
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 | 0.07% | 0.49% | +0.42% |
| 2 | 2025-03-30 | 0.17% | 0.07% | -0.10% |
| 3 | 2025-03-29 | — | 0.17% | — |
EPSS の全履歴 (全 8 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 |
|---|---|---|---|---|---|---|
| 4.3 | 3.1 | MEDIUM |
|
0.7 | 3.6 | [email protected] |
| 4.3 | 3.0 | MEDIUM |
|
0.7 | 3.6 | [email protected] |
| 1.9 | 2.0 | LOW |
|
3.4 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2020-13131 not yet assigned priority: Debian including 1 source packages (yubico-piv-tool), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2020-13131 |
suse
|
medium | — | https://www.suse.com/security/cve/CVE-2020-13131/ |
ubuntu
|
medium | CVE-2020-13131 medium priority: Ubuntu including 1 source packages (yubico-piv-tool), 17 status rows across 17 suites (bionic, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 10, needs-triage 4, ignored 2, DNE 1. | https://ubuntu.com/security/CVE-2020-13131 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| yubico | libykpiv | < 2.1.0 | cpe:2.3:a:yubico:libykpiv:*:*:*:*:*:*:*:* |
| yubico | piv_tool_manager | < 2.0.0 | cpe:2.3:a:yubico:piv_tool_manager:*:*:*:*:*:*:*:* |
| yubico | yubikey_smart_card_minidriver | <= 4.1.0.172 | cpe:2.3:a:yubico:yubikey_smart_card_minidriver:*:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| https://blog.inhq.net/posts/yubico-libykpiv-vuln/ | Exploit Third Party Advisory |
| https://www.yubico.com/products/services-software/download/smart-card-drivers-tools/ | Vendor Advisory |