CVE-2021-39208 (GCVE-0-2021-39208)

Vulnerability from cvelistv5 – Published: 2021-09-16 14:35 – Updated: 2024-08-04 01:58
VLAI
Title
WriteEntryToDirectory used for an archive extraction is vulnerable to partial path traversal.
Summary
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.
Severity
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7986 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
adamhathcock sharpcompress Affected: < 0.29.0
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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