GHSA-qq89-hq3f-393p · 深刻度： high · エコシステム： npm — Arbitrary File Creation/Overwrite via insufficient symlink protection due to directory cache poisoning using symbolic links
The npm package "tar" (aka node-tar) before versions 4.4.18, 5.0.10, and 6.1.9 has an arbitrary file creation/overwrite and arbitrary code execution vulnerability. node-tar aims to guarantee that any file whose location would be modified by a symbolic link is not extracted. This is, in part, achieved by ensuring that extracted directories are not symlinks. Additionally, in order to prevent unnecessary stat calls to determine whether a given path is a directory, paths are cached when directories are created. This logic was insufficient when extracting tar files that contained both a directory and a symlink with names containing unicode values that normalized to the same value. Additionally, on Windows systems, long path portions would resolve to the same file system entities as their 8.3 "short path" counterparts. A specially crafted tar archive could thus include a directory with one form of the path, followed by a symbolic link with a different string that resolves to the same file system entity, followed by a file using the first form. By first creating a directory, and then replacing that directory with a symlink that had a different apparent name that resolved to the same entry in the filesystem, it was thus possible to bypass node-tar symlink checks on directories, essentially allowing an untrusted tar file to symlink into an arbitrary location and subsequently extracting arbitrary files into that location, thus allowing arbitrary file creation and overwrite. These issues were addressed in releases 4.4.18, 5.0.10 and 6.1.9. The v3 branch of node-tar has been deprecated and did not receive patches for these issues. If you are still using a v3 release we recommend you update to a more recent version of node-tar. If this is not possible, a workaround is available in the referenced GHSA-qq89-hq3f-393p.
総合評価: CVE-2021-37712 は中リスク（59.7/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 1.85%、76 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 | 2026-06-24 | 1.72% | 1.85% | +0.13% |
| 2 | 2026-06-15 | 0.09% | 1.72% | +1.63% |
| 3 | 2026-03-03 | — | 0.09% | — |
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 |
|---|---|---|---|---|---|---|
| 8.2 | 3.1 | HIGH |
|
1.8 | 5.8 | [email protected] |
| 8.6 | 3.1 | HIGH |
|
1.8 | 6.0 | [email protected] |
| 4.4 | 2.0 | MEDIUM |
|
3.4 | 6.4 | [email protected] |
GHSA-qq89-hq3f-393p · 深刻度： high · エコシステム： npm — Arbitrary File Creation/Overwrite via insufficient symlink protection due to directory cache poisoning using symbolic links
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
high | CVE-2021-37712: 1 source package rows (nodejs); 9 state rows across 9 repos (3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 9, open 0. | https://security.alpinelinux.org/vuln/CVE-2021-37712 |
debian
|
not yet assigned | CVE-2021-37712 not yet assigned priority: Debian including 1 source packages (node-tar), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2021-37712 |
gentoo
|
low | CVE-2021-37712: 1 GLSA(s) (202405-29), 1 atom(s) (net-libs/nodejs); latest impact low. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2021-37712 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2021-37712 |
suse
|
high | CVE-2021-37712 severity important: SUSE including 39 source package names (12-10.1:nodejs12-12.22.7-4.22.1, 12-10.1:npm12-12.22.7-4.22.1, …), 91 product×package rows across 11 product lines (Container bci/nodejs, SUSE Liberty Linux 8, … (11 product lines)): Fixed 83, Known Not Affected 8. | https://www.suse.com/security/cve/CVE-2021-37712/ |
ubuntu
|
medium | CVE-2021-37712 medium priority: Ubuntu including 1 source packages (node-tar), 15 status rows across 15 suites (bionic, focal, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): needs-triage 8, ignored 7. | https://ubuntu.com/security/CVE-2021-37712 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| npmjs | tar | <= 4.4.17 | cpe:2.3:a:npmjs:tar:*:*:*:*:*:node.js:*:* |
| npmjs | tar | >= 5.0.0, <= 5.0.9 | cpe:2.3:a:npmjs:tar:*:*:*:*:*:node.js:*:* |
| npmjs | tar | >= 6.0.0, <= 6.1.8 | cpe:2.3:a:npmjs:tar:*:*:*:*:*:node.js:*:* |
| debian | debian_linux | 10.0 | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
| debian | debian_linux | 11.0 | cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* |
| oracle | graalvm | 20.3.3 | cpe:2.3:a:oracle:graalvm:20.3.3:*:*:*:enterprise:*:*:* |
| oracle | graalvm | 21.2.0 | cpe:2.3:a:oracle:graalvm:21.2.0:*:*:*:enterprise:*:*:* |
| siemens | sinec_infrastructure_network_services | < 1.0.1.1 | cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf | Patch Third Party Advisory |
| https://github.com/npm/node-tar/security/advisories/GHSA-qq89-hq3f-393p | Patch Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2022/12/msg00023.html | Mailing List Third Party Advisory |
| https://www.debian.org/security/2021/dsa-5008 | Third Party Advisory |
| https://www.npmjs.com/package/tar | Product |
| https://www.oracle.com/security-alerts/cpuoct2021.html | Patch Third Party Advisory |