CVE-2021-32842 Vulnerability Details

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CVE-2021-32842 Metadata Quick Info

CVE Published: 26/01/2022 | CVE Updated: 03/08/2024 | CVE Year: 2021
Source: GitHub_M | Vendor: icsharpcode | Product: sharpziplib
Status : PUBLISHED

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CVE-2021-32842 Description

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.

Metrics

CVSS Version: 3.1 | Base Score: 4 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

l➤ Exploitability Metrics:
    Attack Vector (AV)* LOCAL
    Attack Complexity (AC)* LOW
    Privileges Required (PR)* NONE
    User Interaction (UI)* NONE
    Scope (S)* UNCHANGED

l➤ Impact Metrics:
    Confidentiality Impact (C)* NONE
    Integrity Impact (I)* LOW
    Availability Impact (A)* NONE

Weakness Enumeration (CWE)

CWE-ID: CWE-22
CWE Name: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ( Path Traversal )
Source: icsharpcode

Common Attack Pattern Enumeration and Classification (CAPEC)

CAPEC-ID:
CAPEC Description:


Source: NVD (National Vulnerability Database).