title: Path Traversal in SharpZipLib
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.
problem types: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
affected:
{
product: sharpziplib
vendor: icsharpcode
versions:
lessThan: 1.3.3, status: affected, version: 1.3.3, versionType: custom
lessThan: 1.3.0*, status: affected, version: 1.3.0, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: LOCAL
availabilityImpact: NONE
baseScore: 4
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: LOW
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
version: 3.1
]