GnuTLS 3.6.x before 3.6.13 uses incorrect cryptography for DTLS. The earliest affected version is 3.6.3 (2018-07-16) because of an error in a 2017-10-06 commit. The DTLS client always uses 32 '\0' bytes instead of a random value, and thus contributes no randomness to a DTLS negotiation. This breaks the security guarantees of the DTLS protocol.
総合評価: CVE-2020-11501 は中リスク（55.1/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 3.39%、87 パーセンタイル） 推奨対応: 影響資産を整理し、修補計画に組み込んでください。
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 | 11.49% | 3.39% | -8.10% |
| 2 | 2025-11-21 | 3.34% | 11.49% | +8.14% |
| 3 | 2025-11-18 | — | 3.34% | — |
EPSS の全履歴 （全 21 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 |
|---|---|---|---|---|---|---|
| 7.4 | 3.1 | HIGH |
|
2.2 | 5.2 | [email protected] |
| 5.8 | 2.0 | MEDIUM |
|
8.6 | 4.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
high | CVE-2020-11501: 1 source package rows (gnutls); 14 state rows across 9 repos (3.10-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 9, open 5. | https://security.alpinelinux.org/vuln/CVE-2020-11501 |
debian
|
not yet assigned | CVE-2020-11501 not yet assigned priority: Debian including 1 source packages (gnutls28), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2020-11501 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2020-11501 |
suse
|
high | CVE-2020-11501 severity important: SUSE including 750 source package names (0.0.17-1.1:libgmp10-6.1.2-4.3.1, 0.1.0:libgmp10-6.1.2-4.3.1, …), 1482 product×package rows across 620 product lines (Container bci/bci-base-fips, Container bci/bci-init, … (620 product lines)): Fixed 1257, Known Affected 157, Known Not Affected 68. | https://www.suse.com/security/cve/CVE-2020-11501/ |
ubuntu
|
medium | CVE-2020-11501 medium priority: Ubuntu including 1 source packages (gnutls28), 5 status rows across 5 suites (bionic, eoan, trusty, upstream, xenial): not-affected 2, released 2, DNE 1. | https://ubuntu.com/security/CVE-2020-11501 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| gnu | gnutls | >= 3.6.3, < 3.6.13 | cpe:2.3:a:gnu:gnutls:*:*:*:*:*:*:*:* |
| canonical | ubuntu_linux | 19.10 | cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:* |
| debian | debian_linux | 10.0 | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
| opensuse | leap | 15.1 | cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* |
| fedoraproject | fedora | 31 | cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* |
| fedoraproject | fedora | 32 | cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00015.html | Third Party Advisory |
| https://gitlab.com/gnutls/gnutls/-/commit/5b595e8e52653f6c5726a4cdd8fddeb6e83804d2 | Patch Third Party Advisory |
| https://gitlab.com/gnutls/gnutls/-/issues/960 | Issue Tracking Patch Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ILMOWPKMTZAIMK5F32TUMO34XCABUCFJ/ | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WDYY3R4F5CUTFAMXH2C5NKYFVDEJLTT7/ | |
| https://security.gentoo.org/glsa/202004-06 | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20200416-0002/ | Third Party Advisory |
| https://usn.ubuntu.com/4322-1/ | Third Party Advisory |
| https://www.debian.org/security/2020/dsa-4652 | Third Party Advisory |
| https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-03-31 | Vendor Advisory |