CVE-2021-32841
MEDIUM4.0EPSS 0.38%Path Traversal in SharpZipLib
Published: 2/1/2022Modified: 2/19/2024
Description
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.
Affected packages (1)
- NuGet/SharpZipLib>= 1.3.0, < 1.3.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.0 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
References (5)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2021-32841
- ADVISORYhttps://securitylab.github.com/advisories/GHSL-2021-125-sharpziplib
- PATCHhttps://github.com/icsharpcode/SharpZipLib
- WEBhttps://github.com/icsharpcode/SharpZipLib/commit/5c3b293de5d65b108e7f2cd0ea8f81c1b8273f78
- WEBhttps://github.com/icsharpcode/SharpZipLib/releases/tag/v1.3.3