{"id":"CVE-2021-32842","details":"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.","aliases":["GHSA-mm6g-mmq6-53ff"],"modified":"2026-03-14T10:58:50.831783Z","published":"2022-01-26T21:15:13.337Z","references":[{"type":"ADVISORY","url":"https://github.com/icsharpcode/SharpZipLib/releases/tag/v1.3.3"},{"type":"EVIDENCE","url":"https://securitylab.github.com/advisories/GHSL-2021-125-sharpziplib/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/icsharpcode/sharpziplib","events":[{"introduced":"fa75398a594b80a8945280ae8e7fb2cf1e7dfa70"},{"fixed":"1b1ab013ce1df02d8f27cf582197759c614d9126"}],"database_specific":{"versions":[{"introduced":"1.0.0"},{"fixed":"1.3.3"}]}}],"versions":["v1.0.0","v1.1.0","v1.2.0","v1.3.0","v1.3.1","v1.3.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-32842.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"}]}