cvedb.io
CVE-2021-39208
MEDIUM · CVSS 4.3
EPSS exploitation probability: 0%
Published 2021-09-16T15:15:07.390 · Last modified 2026-06-17T04:03:18.913

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 di

Affected products

sharpcompress_project — sharpcompress

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.