SharpCompress before 0.21.0 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

• https://github.com/adamhathcock/sharpcompress/commit/42b1205fb435de523e6ef8ac5b7bafbe712997f6
• https://github.com/adamhathcock/sharpcompress/pull/374
• https://github.com/snyk/zip-slip-vulnerability
• https://snyk.io/research/zip-slip-vulnerability
• https://snyk.io/vuln/SNYK-DOTNET-SHARPCOMPRESS-60246
• https://github.com/adamhathcock/sharpcompress/commit/42b1205fb435de523e6ef8ac5b7bafbe712997f6
• https://github.com/adamhathcock/sharpcompress/pull/374
• https://github.com/snyk/zip-slip-vulnerability
• https://snyk.io/research/zip-slip-vulnerability
• https://snyk.io/vuln/SNYK-DOTNET-SHARPCOMPRESS-60246