FKIE_CVE-2021-32842

Vulnerability from fkie_nvd - Published: 2022-01-26 21:15 - Updated: 2024-11-21 06:07
Severity ?
4.0 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Summary
SharpZipLib (or #ziplib) is a Zip, GZip, Tar and BZip2 library. Starting version 1.0.0 and prior to version 1.3.3, a check was added if the destination file is under a destination directory. However, it is not enforced that `_baseDirectory` ends with slash. If the _baseDirectory 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. Version 1.3.3 fixed this vulnerability.
References
security-advisories@github.comhttps://github.com/icsharpcode/SharpZipLib/releases/tag/v1.3.3Release Notes, Third Party Advisory
security-advisories@github.comhttps://securitylab.github.com/advisories/GHSL-2021-125-sharpziplib/Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/icsharpcode/SharpZipLib/releases/tag/v1.3.3Release Notes, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://securitylab.github.com/advisories/GHSL-2021-125-sharpziplib/Exploit, Third Party Advisory
Impacted products
Vendor Product Version
sharpziplib_project sharpziplib *
To clipboard 

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      "value": "SharpZipLib (or #ziplib) is a Zip, GZip, Tar and BZip2 library. Starting version 1.0.0 and prior to version 1.3.3, a check was added if the destination file is under a destination directory. However, it is not enforced that `_baseDirectory` ends with slash. If the _baseDirectory 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. Version 1.3.3 fixed this vulnerability."
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      "value": "SharpZipLib (o #ziplib) es una biblioteca Zip, GZip, Tar y BZip2. A partir de la versi\u00f3n 1.0.0 y versiones anteriores a 1.3.3, fue a\u00f1adida una comprobaci\u00f3n de si el archivo de destino est\u00e1 bajo un directorio de destino. Sin embargo, no es exigido que \"_baseDirectory\" termine en barra. Si el directorio base no termina en barra como \"/home/usuario/dir\" es posible crear un archivo con un nombre que comienza como el directorio de destino un nivel m\u00e1s arriba del directorio, por ejemplo \"/home/usuario/dir.sh\". Debido a las restricciones del nombre del archivo y del directorio de destino, el impacto de la creaci\u00f3n arbitraria de archivos es limitado y depende del caso de uso. La versi\u00f3n 1.3.3 ha corregido esta vulnerabilidad"
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  "lastModified": "2024-11-21T06:07:51.860",
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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