A vulnerability was found in libssh, where the authentication check of the connecting client can be bypassed in the`pki_verify_data_signature` function in memory allocation problems. This issue may happen if there is insufficient memory or the memory usage is limited. The problem is caused by the return value `rc,` which is initialized to SSH_ERROR and later rewritten to save the return value of the function call `pki_key_check_hash_compatible.` The value of the variable is not changed between this point and the cryptographic verification. Therefore any error between them calls `goto error` returning SSH_OK.
総合評価: CVE-2023-2283 は中リスク（47.9/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 1.06%、60 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 | 0.20% | 1.06% | +0.86% |
| 2 | 2025-11-21 | 0.43% | 0.20% | -0.23% |
| 3 | 2025-11-18 | — | 0.43% | — |
EPSS の全履歴 （全 18 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 |
|---|---|---|---|---|---|---|
| 6.5 | 3.1 | MEDIUM |
|
3.9 | 2.5 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2023-2283: 1 source package rows (libssh); 8 state rows across 2 repos (3.22-community, edge-community); fixed 0, open 8. | https://security.alpinelinux.org/vuln/CVE-2023-2283 |
debian
|
not yet assigned | CVE-2023-2283 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-2023-2283 |
gentoo
|
high | CVE-2023-2283: 1 GLSA(s) (202312-05), 1 atom(s) (net-libs/libssh); latest impact high. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2023-2283 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2023-2283 |
suse
|
medium | CVE-2023-2283 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, …), 895 product×package rows across 257 product lines (Container bci/golang, Container bci/nodejs, … (257 product lines)): Fixed 602, Known Affected 195, Known Not Affected 98. | https://www.suse.com/security/cve/CVE-2023-2283/ |
ubuntu
|
medium | CVE-2023-2283 medium priority: Ubuntu including 1 source packages (libssh), 9 status rows across 9 suites (bionic, focal, jammy, kinetic, lunar, mantic, trusty, upstream, xenial): released 6, not-affected 2, ignored 1. | https://ubuntu.com/security/CVE-2023-2283 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| libssh | libssh | >= 0.9.1, <= 0.9.6 | cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:* |
| libssh | libssh | >= 0.10.0, <= 0.10.4 | cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:* |
| fedoraproject | fedora | 37 | cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* |
| 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:*:*:*:*:*:*:* |