CVE-2021-32841

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.

Risk Information

Base Score

5.3

MODERATE

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS Score

Exploitation Probability

0.378

Associated Vulnerability

Vulnerability	OS Platform
Vulnerabilities CVE-2021-32842,CVE-2021-32841,CVE-2021-32840 are fixed in Nuget - SharpZipLib 1.3.3	Windows
Vulnerabilities CVE-2021-32842,CVE-2021-32841,CVE-2021-32840 are fixed in Nuget - SharpZipLib for Linux 1.3.3	Linux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234