CVE-2021-39208

Katalog CVE

CVSS 4.3 · Medium EPSS 1,2%

Kerentanan Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') pada sharpcompress project sharpcompress. Skor CVSS 3.1 4.3 (Medium) menurut github.com.

Deskripsi (NVD)

SharpCompress is a fully managed C# library to deal with many compression types and formats. Versions prior to 0.29.0 are vulnerable to partial path traversal. SharpCompress recreates a hierarchy of directories under destinationDirectory if ExtractFullPath is set to true in options. In order to prevent extraction outside the destination directory the destinationFileName path is verified to begin with fullDestinationDirectoryPath. However, prior to version 0.29.0, it is not enforced that fullDestinationDirectoryPath ends with slash. If the destinationDirectory is not slash terminated like `/home/user/dir` it is possible to create a file with a name thats begins as the destination directory one level up from the directory, i.e. `/home/user/dir.sh`. Because of the file name and destination directory constraints the arbitrary file creation impact is limited and depends on the use case. This issue is fixed in SharpCompress version 0.29.0.

Rincian

Terbit di NVD

16 September 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

4.3 (Medium), sumber github.com
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

EPSS (30 hari)

1,2% peluang dieksploitasi; lebih tinggi dari 67,2% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/adamhathcock/sharpcompress/pull/614 patch · advisory pihak ketiga
• https://github.com/adamhathcock/sharpcompress/releases/tag/0.29.0 release notes · advisory pihak ketiga
• https://github.com/adamhathcock/sharpcompress/security/advisories/GHSA-jp7f-grcv-6mjf exploit · advisory pihak ketiga