CVE-2021-32803
See a problem?- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-32803
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-32803.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-32803
- Aliases
- Related
- Published
- 2021-08-03T19:15:08Z
- Modified
- 2024-09-18T03:14:39.111877Z
- Severity
-
- 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
The npm package "tar" (aka node-tar) before versions 6.1.2, 5.0.7, 4.4.15, and 3.2.3 has an arbitrary File Creation/Overwrite vulnerability via insufficient symlink protection.
node-taraims 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 unnecessarystatcalls 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 the same name as the directory. This order of operations resulted in the directory being created and added to thenode-tardirectory cache. When a directory is present in the directory cache, subsequent calls to mkdir for that directory are skipped. However, this is also wherenode-tarchecks for symlinks occur. By first creating a directory, and then replacing that directory with a symlink, it was thus possible to bypassnode-tarsymlink 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. This issue was addressed in releases 3.2.3, 4.4.15, 5.0.7 and 6.1.2. - References
-
- https://github.com/npm/node-tar/security/advisories/GHSA-r628-mhmh-qjhw
- https://www.npmjs.com/advisories/1771
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
- https://github.com/npm/node-tar/commit/9dbdeb6df8e9dbd96fa9e84341b9d74734be6c20
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://www.npmjs.com/package/tar
- https://security.alpinelinux.org/vuln/CVE-2021-32803
- https://security-tracker.debian.org/tracker/CVE-2021-32803
Affected packages
Alpine:v3.16 / tar
Package
- Name
- tar
- Purl
- pkg:apk/alpine/tar?arch=source
Alpine:v3.17 / tar
Package
- Name
- tar
- Purl
- pkg:apk/alpine/tar?arch=source
Alpine:v3.18 / tar
Package
- Name
- tar
- Purl
- pkg:apk/alpine/tar?arch=source
Alpine:v3.19 / tar
Package
- Name
- tar
- Purl
- pkg:apk/alpine/tar?arch=source
Alpine:v3.20 / tar
Package
- Name
- tar
- Purl
- pkg:apk/alpine/tar?arch=source
Debian:11 / node-tar
Package
- Name
- node-tar
- Purl
- pkg:deb/debian/node-tar?arch=source
Debian:12 / node-tar
Package
- Name
- node-tar
- Purl
- pkg:deb/debian/node-tar?arch=source
Debian:13 / node-tar
Package
- Name
- node-tar
- Purl
- pkg:deb/debian/node-tar?arch=source
Git / github.com/isaacs/node-tar
Affected ranges
- Type
- GIT
- Repo
- https://github.com/isaacs/node-tar
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
- Type
- GIT
- Repo
- https://github.com/npm/node-tar
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed