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Security Advisories: GSA_kwCzR0hTQS0yeDdoLTk2aDUtcnE4NM0mqw

Path Traversal in SharpZipLib

SharpZipLib (or #ziplib) is a Zip, GZip, Tar and BZip2 library. Starting version 1.3.0 and prior to version 1.3.3, a check was added if the destination file is under destination directory. However, it is not enforced that destDir ends with slash. If the destDir is not slash terminated like /home/user/dir it is possible to create a file with a name thats begins with the destination 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 contains a patch for this vulnerability.

Permalink: https://github.com/advisories/GHSA-2x7h-96h5-rq84
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS0yeDdoLTk2aDUtcnE4NM0mqw
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: about 2 years ago
Updated: about 1 year ago

CVSS Score: 4.0
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Identifiers: GHSA-2x7h-96h5-rq84, CVE-2021-32841
References:

• https://nvd.nist.gov/vuln/detail/CVE-2021-32841
• https://github.com/icsharpcode/SharpZipLib/commit/5c3b293de5d65b108e7f2cd0ea8f81c1b8273f78
• https://github.com/icsharpcode/SharpZipLib/releases/tag/v1.3.3
• https://securitylab.github.com/advisories/GHSL-2021-125-sharpziplib/
• https://github.com/advisories/GHSA-2x7h-96h5-rq84

Repository: https://github.com/icsharpcode/SharpZipLib
Blast Radius: 1.0

Affected Packages