systemd-tmpfiles in systemd before 237 attempts to support ownership/permission changes on hardlinked files even if the fs.protected_hardlinks sysctl is turned off, which allows local users to bypass intended access restrictions via vectors involving a hard link to a file for which the user lacks write access, as demonstrated by changing the ownership of the /etc/passwd file.
総合評価: CVE-2017-18078 は悪用リスクが高い(68.5/100)。CVSS 深刻度は高。悪用される可能性が高い(EPSS 1.08%、61 パーセンタイル) 根拠: 公開エクスプロイトが 5 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 |
|---|---|---|---|---|
| 43935 | exploit_db | edb | 2018-01-29 | Exploit-DB ↗ |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | 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 | 0.11% | 1.08% | +0.98% |
| 2 | 2025-07-12 | 0.18% | 0.11% | -0.07% |
| 3 | 2025-03-30 | — | 0.18% | — |
EPSS の全履歴 (全 10 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 |
|---|---|---|---|---|---|---|
| 7.8 | 3.1 | HIGH |
|
1.8 | 5.9 | [email protected] |
| 4.6 | 2.0 | MEDIUM |
|
3.9 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2017-18078 unimportant priority: Debian including 1 source packages (systemd), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2017-18078 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2017-18078 |
suse
|
high | CVE-2017-18078 severity important: SUSE including 524 source package names (0.9.1:libsystemd0-228-150.32.1, 0.9.1:libudev1-228-150.32.1, …), 748 product×package rows across 69 product lines (Container caasp/v4/default-http-backend, Container caasp/v4/dnsmasq-nanny, … (69 product lines)): Fixed 480, Known Affected 157, Known Not Affected 111. | https://www.suse.com/security/cve/CVE-2017-18078/ |
ubuntu
|
low | CVE-2017-18078 low priority: Ubuntu including 1 source packages (systemd), 4 status rows across 4 suites (artful, trusty, upstream, xenial): ignored 3, needs-triage 1. | https://ubuntu.com/security/CVE-2017-18078 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| systemd_project | systemd | < 237 | cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:* |
| debian | debian_linux | 8.0 | cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* |
| opensuse | leap | 42.3 | cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| http://lists.opensuse.org/opensuse-updates/2018-02/msg00109.html | Mailing List Third Party Advisory |
| http://packetstormsecurity.com/files/146184/systemd-Local-Privilege-Escalation.html | Exploit Third Party Advisory VDB Entry |
| http://www.openwall.com/lists/oss-security/2018/01/29/3 | Exploit Mailing List Third Party Advisory |
| https://github.com/systemd/systemd/issues/7736 | Exploit Issue Tracking Third Party Advisory |
| https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E | |
| https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E | |
| https://lists.debian.org/debian-lts-announce/2019/04/msg00022.html | Mailing List Third Party Advisory |
| https://www.exploit-db.com/exploits/43935/ | Exploit Third Party Advisory VDB Entry |
| https://www.openwall.com/lists/oss-security/2018/01/29/4 | Mailing List Third Party Advisory |