In Shadow 4.13, it is possible to inject control characters into fields provided to the SUID program chfn (change finger). Although it is not possible to exploit this directly (e.g., adding a new user fails because \n is in the block list), it is possible to misrepresent the /etc/passwd file when viewed. Use of \r manipulations and Unicode characters to work around blocking of the : character make it possible to give the impression that a new user has been added. In other words, an adversary may be able to convince a system administrator to take the system offline (an indirect, social-engineered denial of service) by demonstrating that "cat /etc/passwd" shows a rogue user account.
総合評価: CVE-2023-29383 は公開エクスプロイトあり（50/100）。CVSS 深刻度は低。悪用される可能性が高い（EPSS 0.43%、34 パーセンタイル） 根拠: 公開エクスプロイトが 2 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 ↗ | |
| — | 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 | 0.04% | 0.43% | +0.39% |
| 2 | 2026-06-03 | 0.05% | 0.04% | -0.01% |
| 3 | 2026-05-03 | — | 0.05% | — |
EPSS の全履歴 （全 9 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 |
|---|---|---|---|---|---|---|
| 3.3 | 3.1 | LOW |
|
1.8 | 1.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2023-29383: 1 source package rows (shadow); 10 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 9, open 1. | https://security.alpinelinux.org/vuln/CVE-2023-29383 |
debian
|
not yet assigned | CVE-2023-29383 not yet assigned priority: Debian including 1 source packages (shadow), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2023-29383 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2023-29383 |
suse
|
medium | CVE-2023-29383 severity moderate: SUSE including 422 source package names (0.23.0.3.2.423:login_defs-4.8.1-150300.4.6.1, 0.23.0.3.2.423:shadow-4.8.1-150300.4.6.1, …), 884 product×package rows across 323 product lines (Container bci/bci-init, Container bci/bci-sle15-kernel-module-devel, … (323 product lines)): Fixed 737, Known Affected 147. | https://www.suse.com/security/cve/CVE-2023-29383/ |
ubuntu
|
low | CVE-2023-29383 low priority: Ubuntu including 1 source packages (shadow), 13 status rows across 13 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): needed 5, not-affected 4, ignored 3, released 1. | https://ubuntu.com/security/CVE-2023-29383 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| shadow_project | shadow | 4.13 | cpe:2.3:a:shadow_project:shadow:4.13:*:*:*:*:*:*:* |