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CVE-2018-1002208: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

May 13, 2022 (updated June 30, 2022)

SharpZipLib before 1.0 RC1 is vulnerable to directory traversal, allowing attackers to write to arbitrary files via a ../ (dot dot slash) in a Zip archive entry that is mishandled during extraction. This vulnerability is also known as ‘Zip-Slip’.

References

  • github.com/advisories/GHSA-cqj4-m2pc-v9m5
  • github.com/icsharpcode/SharpZipLib/issues/232
  • github.com/icsharpcode/SharpZipLib/wiki/Release-1.0
  • github.com/snyk/zip-slip-vulnerability
  • nvd.nist.gov/vuln/detail/CVE-2018-1002208
  • snyk.io/research/zip-slip-vulnerability
  • snyk.io/vuln/SNYK-DOTNET-SHARPZIPLIB-60247

Code Behaviors & Features

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Affected versions

All versions up to 1.0.0-alpha2

Fixed versions

  • 1.0.0-rc1

Solution

Upgrade to version 1.0.0-rc1 or above. *Note*: 1.0.0-rc1 may be an unstable version. Use caution.

Impact 5.5 MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Learn more about CVSS

Weakness

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

Source file

nuget/SharpZipLib/CVE-2018-1002208.yml

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