GHSA-mm6g-mmq6-53ff
Path Traversal in SharpZipLib
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| NuGet | SharpZipLib | >= 1.0.0, < 1.3.3 | 1.3.3 |
Details
As written in the advisory (Markdown source, shown as plain text).
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
External links from the advisory. They lead to third-party sites.