A flaw was found in the libssh implements abstract layer for message digest (MD) operations implemented by different supported crypto backends. The return values from these were not properly checked, which could cause low-memory situations failures, NULL dereferences, crashes, or usage of the uninitialized memory as an input for the KDF. In this case, non-matching keys will result in decryption/integrity failures, terminating the connection.
総合評価: CVE-2023-6918 は中リスク(40.1/100)。CVSS 深刻度は低。悪用される可能性が高い(EPSS 1.42%、69 パーセンタイル) 根拠: 直近 1 日で EPSS が +1.05% 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: 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 | 0.37% | 1.42% | +1.05% |
| 2 | 2026-03-01 | 0.31% | 0.37% | +0.06% |
| 3 | 2026-02-21 | — | 0.31% | — |
EPSS の全履歴 (全 20 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 |
|---|---|---|---|---|---|---|
| 3.7 | 3.1 | LOW |
|
2.2 | 1.4 | [email protected] |
| 5.3 | 3.1 | MEDIUM |
|
3.9 | 1.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2023-6918: 1 source package rows (libssh); 13 state rows across 5 repos (3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 5, open 8. | https://security.alpinelinux.org/vuln/CVE-2023-6918 |
debian
|
not yet assigned | CVE-2023-6918 not yet assigned priority: Debian including 1 source packages (libssh), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2023-6918 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2023-6918 |
suse
|
medium | CVE-2023-6918 severity moderate: SUSE including 335 source package names (1.2.3-2.2.63:libssh-config-0.9.8-150400.3.3.1, 1.2.3-2.2.63:libssh4-0.9.8-150400.3.3.1, …), 896 product×package rows across 256 product lines (Container bci/golang, Container bci/nodejs, … (256 product lines)): Fixed 602, Known Affected 195, Known Not Affected 99. | https://www.suse.com/security/cve/CVE-2023-6918/ |
ubuntu
|
medium | CVE-2023-6918 medium priority: Ubuntu including 1 source packages (libssh), 8 status rows across 8 suites (bionic, focal, jammy, lunar, mantic, trusty, upstream, xenial): released 7, ignored 1. | https://ubuntu.com/security/CVE-2023-6918 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| libssh | libssh | >= 0.9.0, < 0.9.8 | cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:* |
| libssh | libssh | >= 0.10.0, < 0.10.6 | cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:* |
| fedoraproject | fedora | 38 | cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* |
| fedoraproject | fedora | 39 | cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 8.0 | cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 9.0 | cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* |