PAC parsing in MIT Kerberos 5 (aka krb5) before 1.19.4 and 1.20.x before 1.20.1 has integer overflows that may lead to remote code execution (in KDC, kadmind, or a GSS or Kerberos application server) on 32-bit platforms (which have a resultant heap-based buffer overflow), and cause a denial of service on other platforms. This occurs in krb5_pac_parse in lib/krb5/krb/pac.c. Heimdal before 7.7.1 has "a similar bug."
総合評価: CVE-2022-42898 は悪用リスクが高い(78.3/100)。CVSS 深刻度は高。悪用される可能性が高い(EPSS 6.42%、93 パーセンタイル) 根拠: 公開エクスプロイトが 1 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 ↗ |
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 | 10.83% | 6.42% | -4.41% |
| 2 | 2026-06-03 | 8.28% | 10.83% | +2.56% |
| 3 | 2026-05-15 | — | 8.28% | — |
EPSS の全履歴 (全 35 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 |
|---|---|---|---|---|---|---|
| 8.8 | 3.1 | HIGH |
|
2.8 | 5.9 | [email protected] |
| 8.8 | 3.1 | HIGH |
|
2.8 | 5.9 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2022-42898: 3 source package rows (heimdal, krb5, samba); 20 state rows across 7 repos (3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 20, open 0. | https://security.alpinelinux.org/vuln/CVE-2022-42898 |
debian
|
not yet assigned | CVE-2022-42898 not yet assigned priority: Debian including 3 source packages (heimdal, krb5, samba), 15 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 14, open 1. | https://security-tracker.debian.org/tracker/CVE-2022-42898 |
gentoo
|
normal | CVE-2022-42898: 3 GLSA(s) (202309-06, 202310-06, 202405-11), 3 atom(s) (app-crypt/heimdal, app-crypt/mit-krb5, net-fs/samba); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2022-42898 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2022-42898 |
suse
|
medium | CVE-2022-42898 severity moderate: SUSE including 722 source package names (0.23.0.3.2.368:krb5-1.19.2-150300.7.7.1, 0.9.1-rev1.1.0-build3.2.22:krb5-1.19.2-150300.7.7.1, …), 1689 product×package rows across 285 product lines (Container bci/bci-init, Container bci/dotnet-aspnet, … (285 product lines)): Fixed 1551, Known Affected 116, Known Not Affected 22. | https://www.suse.com/security/cve/CVE-2022-42898/ |
ubuntu
|
medium | CVE-2022-42898 medium priority: Ubuntu including 3 source packages (heimdal, krb5, samba), 39 status rows across 13 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): released 19, not-affected 12, ignored 5, needed 3. | https://ubuntu.com/security/CVE-2022-42898 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| mit | kerberos_5 | >= 1.8, < 1.19.4 | cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:* |
| mit | kerberos_5 | 1.20 | cpe:2.3:a:mit:kerberos_5:1.20:-:*:*:*:*:*:* |
| mit | kerberos_5 | 1.20 | cpe:2.3:a:mit:kerberos_5:1.20:beta1:*:*:*:*:*:* |
| heimdal_project | heimdal | < 7.7.1 | cpe:2.3:a:heimdal_project:heimdal:*:*:*:*:*:*:*:* |
| samba | samba | < 4.15.12 | cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* |
| samba | samba | >= 4.16.0, < 4.16.7 | cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* |
| samba | samba | >= 4.17.0, < 4.17.3 | cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| https://bugzilla.samba.org/show_bug.cgi?id=15203 | Exploit Issue Tracking Patch Third Party Advisory |
| https://github.com/heimdal/heimdal/security/advisories/GHSA-64mq-fvfj-5x3c | Third Party Advisory |
| https://github.com/krb5/krb5/commit/ea92d2f0fcceb54a70910fa32e9a0d7a5afc3583 | Patch Third Party Advisory |
| https://security.gentoo.org/glsa/202309-06 | |
| https://security.gentoo.org/glsa/202310-06 | |
| https://security.netapp.com/advisory/ntap-20230216-0008/ | |
| https://security.netapp.com/advisory/ntap-20230223-0001/ | |
| https://web.mit.edu/kerberos/advisories/ | Vendor Advisory |
| https://web.mit.edu/kerberos/krb5-1.19/ | Release Notes Vendor Advisory |
| https://web.mit.edu/kerberos/krb5-1.20/README-1.20.1.txt | Vendor Advisory |
| https://www.samba.org/samba/security/CVE-2022-42898.html | Third Party Advisory |