SharpZipLib (or #ziplib) is a Zip, GZip, Tar and BZip2 library. Prior to version 1.3.3, a TAR file entry ../evil.txt may be extracted in the parent directory of destFolder. This leads to arbitrary file write that may lead to code execution. The vulnerability was patched in version 1.3.3.
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-32840
- https://github.com/icsharpcode/SharpZipLib/commit/a0e96de70b5264f4c919b09253b1522bc7a221cc
- https://github.com/icsharpcode/SharpZipLib/releases/tag/v1.3.3
- https://securitylab.github.com/advisories/GHSL-2021-125-sharpziplib/
- https://github.com/advisories/GHSA-m22m-h4rf-pwq3